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Hashish (; ), usually abbreviated as hash, is a compressed form of resin (trichomes) derived from the
cannabis ''Cannabis'' () is a genus of flowering plants in the family Cannabaceae that is widely accepted as being indigenous to and originating from the continent of Asia. However, the number of species is disputed, with as many as three species be ...
flowers. European Monitoring Centre for Drugs and Drug Addiction, Lisbon, As a
psychoactive substance A psychoactive drug, psychopharmaceutical, mind-altering drug, consciousness-altering drug, psychoactive substance, or psychotropic substance is a chemical substance that alters psychological functioning by modulating central nervous system acti ...
, it is consumed plain or mixed with
tobacco Tobacco is the common name of several plants in the genus '' Nicotiana'' of the family Solanaceae, and the general term for any product prepared from the cured leaves of these plants. More than 70 species of tobacco are known, but the ...
. It has a long history of use in countries such as
Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. It is bordered by Pakistan to the Durand Line, east and south, Iran to the Afghanistan–Iran borde ...
,
India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
,
Pakistan Pakistan, officially the Islamic Republic of Pakistan, is a country in South Asia. It is the List of countries and dependencies by population, fifth-most populous country, with a population of over 241.5 million, having the Islam by country# ...
,
Iran Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...
,
Iraq Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to Iraq–Saudi Arabia border, the south, Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and ...
,
Lebanon Lebanon, officially the Republic of Lebanon, is a country in the Levant region of West Asia. Situated at the crossroads of the Mediterranean Basin and the Arabian Peninsula, it is bordered by Syria to the north and east, Israel to the south ...
,
Morocco Morocco, officially the Kingdom of Morocco, is a country in the Maghreb region of North Africa. It has coastlines on the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to Algeria–Morocc ...
, and
Egypt Egypt ( , ), officially the Arab Republic of Egypt, is a country spanning the Northeast Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via the Sinai Peninsula. It is bordered by the Mediterranean Sea to northe ...
. Hashish consumption is also popular in Europe. In the United States, dried flowers or concentrates are more popular, and hash has seen a relative decrease in popularity following changes in laws that have indirectly allowed for the development and increased availability of cannabis extracts that are more potent than traditional hashish, although regional differences in product preferences exist. Like many recreational drugs, multiple synonyms and alternative names for hashish exist, and vary greatly depending on the country and native language. Hashish is a cannabis concentrate product composed of compressed or purified preparations of stalked resin glands, called trichomes, from the plant. It is defined by the 1961 UN
Single Convention on Narcotic Drugs The Single Convention on Narcotic Drugs, 1961 (Single Convention, 1961 Convention, or C61) is an international treaty that controls activities (cultivation, production, supply, trade, transport) involving specific narcotic drugs and lays down a ...
(Schedule I and IV) as "the separated resin, whether crude or purified, obtained from the cannabis plant". The resin contains ingredients such as
tetrahydrocannabinol Tetrahydrocannabinol (THC) is a cannabinoid found in cannabis. It is the principal psychoactive constituent of ''Cannabis'' and one of at least 113 total cannabinoids identified on the plant. Although the chemical formula for THC (C21H30O2) de ...
(THC) and other
cannabinoid Cannabinoids () are several structural classes of compounds found primarily in the ''Cannabis'' plant or as synthetic compounds. The most notable cannabinoid is the phytocannabinoid tetrahydrocannabinol (THC) (delta-9-THC), the primary psychoact ...
s—but often in higher concentrations than the unsifted or unprocessed cannabis flower. Purities of confiscated hashish in Europe (2011) range between 3% and 15%. Between 2000 and 2005, the percentage of hashish in cannabis end product seizures was at 18%. With the strength of unprocessed cannabis flowers having increased greatly in recent years—with flowers containing upwards of 25% THC by weight—the strength of hashish produced today and in the future is likely to be far more potent than in these older records. The consistency and appearance of hashish is highly dependent on the process used and the amount of leftover plant material (e.g. chlorophyll). It is typically solid, though its consistency ranges from brittle to malleable. It is most commonly light or dark brown in color, though may appear transparent, yellow, black, or red. In recent years, the terpene ''hashishene'' was identified as possibly responsible for the characteristic smell and aroma of hashish, as compared to raw herbal cannabis.


History

Hashish has been consumed for many centuries, though there is no clear evidence as to its first appearance.Hashish! by Robert Connell Clarke, North
India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
and
Nepal Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain. It borders the Tibet Autonomous Region of China Ch ...
have a long social tradition in the production of hashish, known locally as ''
charas Charas is a cannabis concentrate made from the resin of a live cannabis plant (''Cannabis sativa'' either ''Cannabis indica, ''Indica' subspecies or ''Sativa'' subspecies) and is handmade in the Indian subcontinent. The plant grows wild thr ...
''. The first attestation of the term "hashish" is in a pamphlet published in Cairo in 1123 CE, accusing
Nizari Nizari Isma'ilism () are the largest segment of the Isma'ilism, Ismailis, who are the second-largest branch of Shia Islam after the Twelvers. Nizari teachings emphasise independent reasoning or ''ijtihad''; Pluralism (philosophy), pluralism— ...
Muslims of being "hashish-eaters". The cult of Nizari militants which emerged after the fall of the
Fatimid Caliphate The Fatimid Caliphate (; ), also known as the Fatimid Empire, was a caliphate extant from the tenth to the twelfth centuries CE under the rule of the Fatimids, an Isma'ili Shi'a dynasty. Spanning a large area of North Africa and West Asia, i ...
is commonly called the sect of the Assassins—a corruption of '' hashishin,'' Arabic for "hashish-smokers." The 13th-century jurist
Ibn Taymiyyah Ibn Taymiyya (; 22 January 1263 – 26 September 1328)Ibn Taymiyya, Taqi al-Din Ahmad, The Oxford Dictionary of Islam. http://www.oxfordreference.com/view/10.1093/acref/9780195125580.001.0001/acref-9780195125580-e-959 was a Sunni Muslim ulama, ...
prohibited the use of hashish; he mentioned that it was introduced to Levant with the
Mongol invasion The Mongol invasions and conquests took place during the 13th and 14th centuries, creating history's largest contiguous empire, the Mongol Empire (1206–1368), which by 1260 covered large parts of Eurasia. Historians regard the Mongol devastati ...
(throughout the 13th century). Smoking did not become common in the Old World until after the introduction of tobacco; until the 1500s, hashish was consumed as an edible in the Muslim world. In 1596, Dutchman Jan Huyghen van Linschoten spent three pages on "Bangue" (''
bhang Bhang (International Alphabet of Sanskrit Transliteration, IAST: ''Bhāṅg'') is an Cannabis edible, edible preparation made from the leaves of the Cannabis (drug), cannabis plant originating from the Indian subcontinent. ''Cannabis sativa'' ...
'') in his historic work documenting his journeys in the East. He particularly mentioned the Egyptian hashish. Full text at Internet Archive.
Chapter on Bangue
He said, "Bangue is likewise much used in Turkie and Egypt, and is made in three sorts, having also three names. The first by the Egyptians is called Assis (Hashish (Arab.)), which is the poulder of Hemp, or of Hemp leaves, which is water made in paste or dough, they would eat five pieces, (each) as big as a Chestnut (or larger); This is used by the common people, because it is of a small price, and it is no wonder, that such vertue proceedeth from the Hempe, for that according to Galens opinion, Hempe excessively filleth the head." Hashish arrived in Europe from the East during the 18th century, and is first mentioned scientifically by
Gmelin Gmelin may refer to: * Karl Christian Gmelin, Carl Christian Gmelin (1762–1837), German botanist, author of ''Flora Badensis, Alsatica et confinium regionum cis- et transrhenania'' (1806) * Charles Gmelin (1872–1950), British Olympic athlete * ...
in 1777. The Napoleonic campaigns introduced French troops to hashish in Egypt and the first description of its useful stems was in 1830 by pharmacist and botanist Theodor Friedrich Ludwig Nees von Esenbeck. In 1839, O'Shaughnessy wrote a comprehensive study of Himalayan hemp, which was recognised by the European school of medicine and describes hashish as relief for cramps and causing the disappearance of certain symptoms from afflictions such as rabies, cholera, and tetanus. This led to high hopes in the medical community. In 1840, Louis Aubert-Roche reported his successful use of hashish against pestilence. Also, psychiatric experiments with hashish were done at the same time with Jacques-Joseph Moreau being convinced that it is the supreme medicament for use in psychiatry. In the 19th century, hashish was embraced in some European literary circles. Most famously, the Club des Hashischins was a
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
ian club dedicated to the consumption of hashish and other drugs; its members included writers
Théophile Gautier Pierre Jules Théophile Gautier ( , ; 30 August 1811 – 23 October 1872) was a French poet, dramatist, novelist, journalist, and art and literary critic. While an ardent defender of Romanticism, Gautier's work is difficult to classify and rema ...
, Dr. Moreau de Tours,
Victor Hugo Victor-Marie Hugo, vicomte Hugo (; 26 February 1802 – 22 May 1885) was a French Romanticism, Romantic author, poet, essayist, playwright, journalist, human rights activist and politician. His most famous works are the novels ''The Hunchbac ...
,
Alexandre Dumas Alexandre Dumas (born Alexandre Dumas Davy de la Pailleterie, 24 July 1802 – 5 December 1870), also known as Alexandre Dumas , was a French novelist and playwright. His works have been translated into many languages and he is one of the mos ...
,
Charles Baudelaire Charles Pierre Baudelaire (, ; ; 9 April 1821 – 31 August 1867) was a French poet, essayist, translator and art critic. His poems are described as exhibiting mastery of rhythm and rhyme, containing an exoticism inherited from the Romantics ...
and
Honoré de Balzac Honoré de Balzac ( , more commonly ; ; born Honoré Balzac; 20 May 1799 – 18 August 1850) was a French novelist and playwright. The novel sequence ''La Comédie humaine'', which presents a panorama of post-Napoleonic French life, is ...
.Levinthal, C. F. (2012). ''Drugs, behavior, and modern society''. (6th ed.). Boston: Pearson College Div. Baudelaire later wrote the 1860 book '' Les paradis artificiels'' about the state of being under the influence of opium and hashish. Around the same time, American author
Fitz Hugh Ludlow Fitz Hugh Ludlow, sometimes seen as Fitzhugh Ludlow (September 11, 1836 – September 12, 1870), was an American author, journalist, and explorer; best known for his autobiographical book ''The Hasheesh Eater'' (1857). Ludlow also wrote about hi ...
wrote the 1857 book '' The Hasheesh Eater'' about his youthful experiences, both positive and negative, with the drug. Hashish was also mentioned and used as an anesthetic in Germany in 1869. It was imported in great quantities especially from India where it was called charas. However, there were also people who did not deem cannabis as harmless. Between 1880 and 1900 was the peak of the medicinal use, where hashish compounds were most commonplace in almost all European countries and the USA. Evidence of misuse at that time was practically non-existent (as opposed to widespread reports in Asia and Africa). Hashish played a significant role in the treatment of pain, migraine,
dysmenorrhea Dysmenorrhea, also known as period pain, painful periods or menstrual cramps, is pain during menstruation. Its usual onset occurs around the time that menstruation begins. Symptoms typically last less than three days. The pain is usually in th ...
,
pertussis Whooping cough ( or ), also known as pertussis or the 100-day cough, is a highly contagious, vaccine-preventable bacterial disease. Initial symptoms are usually similar to those of the common cold with a runny nose, fever, and mild cough, bu ...
, asthma and insomnia in Europe and USA towards the end of the 19th century. Rare applications included stomach ache, depression, diarrhea, diminished appetite, pruritus, hemorrhage, Basedow syndrome and malaria. The use was later prohibited worldwide as the use as a medicine was made impossible by the 1961 UN
Single Convention on Narcotic Drugs The Single Convention on Narcotic Drugs, 1961 (Single Convention, 1961 Convention, or C61) is an international treaty that controls activities (cultivation, production, supply, trade, transport) involving specific narcotic drugs and lays down a ...
. At the beginning of the 20th century, the majority of hashish in Europe came from Kashmir and other parts of India, Afghanistan, as well as Greece, Syria, Nepal, Lebanon, and Turkey. Larger markets developed in the late 1960s and early 1970s when most of the hashish was imported from Pakistan and Afghanistan. In Greece, Hashish was prevalent in the early decades of the 20th century, and although locally produced for hundreds of years prior, it reached its peak with the coming of two and a half million Greek refugees, expelled from Turkey following the disastrous 1919-21 war. Many of these refugees had habitually smoked hashish in Turkey, using waterpipes, (hookas) called "arghilethes", and due to extreme poverty upon arriving in Greece, and living in overcrowded and poor refugee communities, many hashish dens, called "tekethes", sprung up in Greece's larger cities, the port city of Piraeus, and the northern city of Thessaloniki (where many refugees lived). This gave rise to a substantial urban underclass and sub culture of hashish smokers called "hasiklithes", and a musical genre " rembetika" (oriental sounding), "urban blues" played on the bouzouki, tzoura, and oriental instruments such as the baglama, outi (oud) and kanonaki (kanun) that spoke of life as a hashish user in the "tekethes", as well as about life as refugees, society's unfairness, lack of financial opportunities, prejudice against the refugees, and the deceit of lovers and others in the community. The "tekethes" were closed down in the 1930s by the Greek police and the "rembetes" were jailed and ostracized. In succeeding decades, there was a strong resurgence in Greece of "rembetika" music with the songs of the rembetes and hasiklithes being continually performed publicly by many including the younger generation, as a form of cultural heritage, and have gained respectability and popularity for their frank expressions of that period, and Greek society in general. Due to disruptive conflicts in the regions, Morocco took over and was the sufficient exporter until lately. It is believed that massive hashish production for international trade originated in
Morocco Morocco, officially the Kingdom of Morocco, is a country in the Maghreb region of North Africa. It has coastlines on the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to Algeria–Morocc ...
during the 1960s, where the cannabis plant was widely available. Before the coming of the first hippies from the
Hippie Trail The hippie trail (also the overland) was an overland journey taken by members of the hippie subculture and others from the mid-1950s to the late 1970s travelling from Europe and Western Asia, West Asia through South Asia via countries such a ...
, only small pieces of Lebanese hashish were found in Morocco. However, since the 2000s, there has been a dramatic shift in the market due to an increase of homegrown cannabis production. While Morocco held a quasi-monopoly on hashish in the 1990s with the so-called "soap bar" blocks, which were of low quality, Afghanistan is now regarded as the biggest producer of higher quality hashish. Since then, hashish quality in Europe has increased while its prices have remained stable, with the exception of during the
COVID-19 pandemic The COVID-19 pandemic (also known as the coronavirus pandemic and COVID pandemic), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), began with an disease outbreak, outbreak of COVID-19 in Wuhan, China, in December ...
, where the cannabis street prices surged due to various national lockdowns. Hashish remains in high demand in most of the world while quality continues to increase, due to many Moroccan and western farmers in Morocco and other hash producing countries using more advanced cultivation methods as well as cultivating further developed cannabis strains which increases yields greatly, as well as improving resin quality with higher ratios of psychoactive ingredients (THC). A tastier, smoother and more aromatic terpenes and flavonoids profile is seen as an indicator of a significant rise in hashish quality in more recent years. Hashish production in Spain has also become more popular and is on the rise, however the demand for relatively cheap and high-quality Moroccan hash is still extremely high. Changes to regulations around the world have contributed greatly to more and more countries becoming legitimate hashish producing regions, with countries like Spain effecting more lenient laws on cannabis products such as hashish. Washington State followed by Colorado started regulating cultivation, manufacturing and distribution of cannabis and cannabis derived products such as hashish in the United States, followed by many other places in the US (such as Humboldt, California) and around the world.


European market

According to the European Monitoring Centre for Drugs and Drug Addiction ( EMCDDA), Western Europe is the biggest market for cannabis resin with 70% of global seizures. However, the European hashish market is changing. Cannabis cultivation increased throughout the 1990s until 2004, with a noticeable decrease reported in 2005 according to the European Monitoring Centre for Drugs and Drug Addiction. Historically, Morocco has been the major source for hashish. Lately, however, there has been a shift in the market, and Afghanistan has been named the major producer of hashish. Even though a drop in usage and production has been reported, Morocco produced around 6600 tonnes of resin in 2005. As 641 tonnes of hashish were consumed in the EU in 2013, the European market is currently the world's largest and most profitable. Therefore, many players are involved in the business, including organised crime groups. The largest cannabis resin seizures in Europe happen in Portugal, due to its proximity to Northern Africa. The 1990s "soap bars" disappeared and the physical shapes of hashish changed to melon shaped, tablets or olive shaped pellets. Overall the general trend of domestically grown cannabis displacing the imported resin leads to a market reaction of potency changes while the prices remain stable while soap-bar potency increased from 8% to up to 20.7% in 2014. Generally, more resin than herb is consumed in Europe.


Substance properties

Hashish is made from
cannabinoid Cannabinoids () are several structural classes of compounds found primarily in the ''Cannabis'' plant or as synthetic compounds. The most notable cannabinoid is the phytocannabinoid tetrahydrocannabinol (THC) (delta-9-THC), the primary psychoact ...
-rich glandular hairs known as
trichome Trichomes (; ) are fine outgrowths or appendages on plants, algae, lichens, and certain protists. They are of diverse structure and function. Examples are hairs, glandular hairs, scales, and papillae. A covering of any kind of hair on a plant ...
s, as well as varying amounts of cannabis flower and leaf fragments. The flowers of a mature female plant contain the most trichomes, though trichomes are also found on other parts of the plant. Certain strains of cannabis are cultivated specifically for their ability to produce large amounts of trichomes. The resin reservoirs of the trichomes, sometimes erroneously called
pollen Pollen is a powdery substance produced by most types of flowers of seed plants for the purpose of sexual reproduction. It consists of pollen grains (highly reduced Gametophyte#Heterospory, microgametophytes), which produce male gametes (sperm ...
(vendors often use the euphemism "pollen catchers" to describe screened kief-grinders in order to skirt paraphernalia-selling laws), are separated from the plant through various methods. Hashish samples from India, Lebanon and Morocco confiscated in Europe and Israel in 2005 contained all appreciable amounts of
cannabidiol Cannabidiol (CBD) is a phytocannabinoid, one of 113 identified cannabinoids in ''Cannabis'', along with tetrahydrocannabinol (THC), and accounts for up to 40% of the plant's extract. Medically, it is an anticonvulsant used to treat multiple f ...
(CBD), and cannabinol (CBN), in addition to
tetrahydrocannabinol Tetrahydrocannabinol (THC) is a cannabinoid found in cannabis. It is the principal psychoactive constituent of ''Cannabis'' and one of at least 113 total cannabinoids identified on the plant. Although the chemical formula for THC (C21H30O2) de ...
(THC). In some samples the CBD-content was significantly higher than the THC-content. The simultaneous occurrence of these three cannabinoids constitute the typical, chemical profile of hashish consumed in Europe and Northern Africa. In comparison, most high-potency cannabis products contain only THC. It is believed that the psychotropic effects of hashish are therefore more subtle, and
sedative A sedative or tranquilliser is a substance that induces sedation by reducing irritability or Psychomotor agitation, excitement. They are central nervous system (CNS) Depressant, depressants and interact with brain activity, causing its decelera ...
. In a study conducted in 2014 by Jean-Jaques Filippi, Marie Marchini, Céline Charvoz, Laurence Dujourdy and Nicolas Baldovini (''Multidimensional analysis of cannabis volatile constituents: Identification of 5,5-dimethyl-1-vinylbicyclo .1.1exane as a volatile marker of hashish, the resin of Cannabis sativa L.'') the researchers linked the characteristic flavour of hashish with a rearrangement of
myrcene Myrcene, or β-myrcene, is a terpene, monoterpene. A colorless oil, it occurs widely in essential oils. It is produced mainly semi-synthetically from ''Myrcia'', from which it gets its name. It is an intermediate in the production of several frag ...
caused during the process of manufacture. Depending on the production process, the product can be contaminated with different amounts of dirt and plant fragments, varying greatly in terms of appearance, texture, odour and potency. Also, adulterants may be added in order to increase weight or modify appearance.


Short-term effects

Hashish can be consumed by oral ingestion or smoking. When smoked, it may be smoked in a pipe,
bong A bong (also known as a water pipe) is a filtration device generally used for smoking cannabis, tobacco, or other herbal substances. In the bong shown in the photo, the smoke flows from the lower port on the left to the upper port on the right ...
, vaporizer or
joints A joint or articulation (or articular surface) is the connection made between bones, ossicles, or other hard structures in the body which link an animal's skeletal system into a functional whole.Saladin, Ken. Anatomy & Physiology. 7th ed. McGraw- ...
, where it is often mixed with
tobacco Tobacco is the common name of several plants in the genus '' Nicotiana'' of the family Solanaceae, and the general term for any product prepared from the cured leaves of these plants. More than 70 species of tobacco are known, but the ...
, as pure hashish will burn poorly alone. THC has a low water solubility therefore it is most effective when ingested alongside a fatty meal or snack. Not all hashish can be consumed orally as some is not decarboxylated during manufacture. Generally the methods are similar to overall cannabis consumption. As hashish’s active ingredient is THC, it has the same effects as cannabis. The onset is felt within 15 minutes when smoking, and about 30 to 60 minutes when eaten. Common effects include: * changes in perception; including a feeling of relaxation, pleasure (“high” or
euphoria Euphoria ( ) is the experience (or affect) of pleasure or excitement and intense feelings of well-being and happiness. Certain natural rewards and social activities, such as aerobic exercise, laughter, listening to or making music and da ...
) 200px, Blood-shot eyes are a sign of cannabis use. * poor short-term memory * increased appetite * altered feeling in the
sense A sense is a biological system used by an organism for sensation, the process of gathering information about the surroundings through the detection of Stimulus (physiology), stimuli. Although, in some cultures, five human senses were traditio ...
s (the ability to see colors, hear sounds and taste food more clearly), as a result of the drug increasing the activity of the senses * altered sense of time and space (feeling that time is slow and the distances are longer) * dry mouth and throat * impaired motor skills * cognitive impairment, including poor reactions * blood-shot eye * fast heartbeat *
orthostatic hypotension Orthostatic hypotension, also known as postural hypotension, is a medical condition wherein a person's blood pressure drops when they are standing up ( orthostasis) or sitting down. Primary orthostatic hypotension is also often referred to as ne ...
(a drop in blood pressure when standing) Side effects with overdose may include
anxiety Anxiety is an emotion characterised by an unpleasant state of inner wikt:turmoil, turmoil and includes feelings of dread over Anticipation, anticipated events. Anxiety is different from fear in that fear is defined as the emotional response ...
,
paranoia Paranoia is an instinct or thought process that is believed to be heavily influenced by anxiety, suspicion, or fear, often to the point of delusion and irrationality. Paranoid thinking typically includes persecutory beliefs, or beliefs of co ...
and
panic Panic is a sudden sensation of fear, which is so strong as to dominate or prevent reason and logical thinking, replacing it with overwhelming feelings of anxiety, uncertainty and frantic agitation consistent with a fight-or-flight reaction. ...
.


Manufacturing processes

The sticky resins of the fresh flowering female cannabis plant are collected. Traditionally this was, and still is, done in remote locations by pressing or rubbing the flowering plant between two hands and then forming the sticky resins into a small ball of hashish called
charas Charas is a cannabis concentrate made from the resin of a live cannabis plant (''Cannabis sativa'' either ''Cannabis indica, ''Indica' subspecies or ''Sativa'' subspecies) and is handmade in the Indian subcontinent. The plant grows wild thr ...
. This method produces the highest amount of cannabinoids (THC content up to 60%) without chemical solvents or distillation. The best quality charas is produced in
Central Asia Central Asia is a region of Asia consisting of Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan. The countries as a group are also colloquially referred to as the "-stans" as all have names ending with the Persian language, Pers ...
, and sold in sausage-like shapes. Mechanical separation methods use physical action to remove the trichomes from the dried plant material, such as sieving through a screen by hand or in motorized tumblers. This technique is known as "drysifting". The resulting powder, referred to as "kief" or "drysift", is compressed with the aid of heat into blocks of hashish; if pure, the kief will become gooey and pliable. When a high level of pure THC is present, the end product will be almost transparent and will start to melt at the point of human contact. Ice-water separation is another mechanical method of isolating trichomes. Newer techniques have been developed such as heat and pressure separations, static-electricity sieving or acoustical dry sieving. Trichomes may break away from supporting stalks and leaves when plant material becomes brittle at low temperatures. After plant material has been agitated in an icy slush, separated trichomes are often dense enough to sink to the bottom of the ice-water mixture following agitation, while lighter pieces of leaves and stems tend to float. The ice-water method requires ice, water, agitation, filtration bags with various-sized screens and plant material. With the ice-water extraction method the resin becomes hard and brittle and can easily be separated. This allows large quantities of pure resins to be extracted in a very clean process without the use of solvents, making for a more purified hashish. Chemical separation methods generally use a
solvent A solvent (from the Latin language, Latin ''wikt:solvo#Latin, solvō'', "loosen, untie, solve") is a substance that dissolves a solute, resulting in a Solution (chemistry), solution. A solvent is usually a liquid but can also be a solid, a gas ...
such as
ethanol Ethanol (also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound with the chemical formula . It is an Alcohol (chemistry), alcohol, with its formula also written as , or EtOH, where Et is the ps ...
,
butane Butane () is an alkane with the formula C4H10. Butane exists as two isomers, ''n''-butane with connectivity and iso-butane with the formula . Both isomers are highly flammable, colorless, easily liquefied gases that quickly vaporize at ro ...
or
hexane Hexane () or ''n''-hexane is an organic compound, a straight-chain alkane with six carbon atoms and the molecular formula C6H14. Hexane is a colorless liquid, odorless when pure, and with a boiling point of approximately . It is widely used as ...
to dissolve the
lipophilic Lipophilicity (from Greek language, Greek λίπος "fat" and :wikt:φίλος, φίλος "friendly") is the ability of a chemical compound to dissolve in fats, oils, lipids, and non-polar solvents such as hexane or toluene. Such compounds are c ...
desirable resin. Remaining plant materials are filtered out of the solution and sent to the compost. The solvent is then evaporated, or boiled off (purged) leaving behind the desirable resins, called honey oil, "
hash oil Hash oil or cannabis oil is an oleoresin obtained by the extraction (chemistry), extraction of cannabis or hashish. It is a cannabis concentrate containing many of its Resin, resins and terpenes – in particular, tetrahydrocannabinol (THC), c ...
", or just "oil". Honey oil still contains waxes and
essential oil An essential oil is a concentrated hydrophobic liquid containing volatile (easily evaporated at normal temperatures) chemical compounds from plants. Essential oils are also known as volatile oils, ethereal oils, aetheroleum, or simply as the ...
s and can be further purified by vacuum distillation to yield "red oil". The product of chemical separations is more commonly referred to as "honey oil". This oil is not really hashish, as the latter name covers trichomes that are extracted by sieving. This leaves most of the glands intact. Morocco has been the major hashish producer globally with €10.8 billion earned from Moroccan resin in 2004, but some so-called "Moroccan" may actually be European-made. The income for the farmers was around €325 million in 2005. While the overall number of plants and areas shrank in size, the introduction of more potent hybrid plants produced a high resin rate. The amount of resin produced is estimated to range between 3,800 and 9,500 tonnes in 2005. The largest producer today is Afghanistan, however studies suggest there is a "hashish revival" in Morocco. Solventless Rosin Method was discovered by Phil Salazar in 2015. Rosin is created by pressing Cannabis Flower, Dry sift, or Ice water hash in between parchment paper using a pneumatic or hydraulic press with heated plates to create force and pressure to expel the oil from the product. The moisture present in the flower, Dry Sift, or ice water hash will create steam pressure and force the oil from the source creating a solventless hash product.


Quality

Tiny pieces of leaf matter may be accidentally or even purposefully added;
adulterant An adulterant is a substance secretly added to another that may compromise the safety or effectiveness. Typical substances that are adulterated include food, cosmetics, pharmaceuticals or fuels. Definition Adulteration is the practice of secre ...
s introduced when the hashish is being produced will reduce the purity of the material and often resulting in green finished product. If hash is particularly sticky, this can mean that additional oils have been added to increase the overall weight of the product. The most common quality indicator is the smell. High-quality hash will smell fragrant and aromatic, whereas hash of low quality may have a distinct mouldy or musty aroma. The
tetrahydrocannabinol Tetrahydrocannabinol (THC) is a cannabinoid found in cannabis. It is the principal psychoactive constituent of ''Cannabis'' and one of at least 113 total cannabinoids identified on the plant. Although the chemical formula for THC (C21H30O2) de ...
(THC) content of hashish comes in wide ranges from almost none to 65% and that of
hash oil Hash oil or cannabis oil is an oleoresin obtained by the extraction (chemistry), extraction of cannabis or hashish. It is a cannabis concentrate containing many of its Resin, resins and terpenes – in particular, tetrahydrocannabinol (THC), c ...
from 30% to 90%. Hashish can also contain appreciable amounts of CBD, CBN and also contain trace amounts of other
cannabinoid Cannabinoids () are several structural classes of compounds found primarily in the ''Cannabis'' plant or as synthetic compounds. The most notable cannabinoid is the phytocannabinoid tetrahydrocannabinol (THC) (delta-9-THC), the primary psychoact ...
s. As mentioned above, there has been a general increase in potency as the competition has grown bigger and new hybrid plants have been developed.


See also

*
Cannabis concentrate Cannabis concentrate, also called marijuana concentrate, marijuana extract, or cannabis extract, is a tetrahydrocannabinol (THC) and/or cannabidiol (CBD) concentrated mass. Cannabis concentrates contain high THC levels that range from 40% to ...
* Cannabis culture * Hemp oil


References

Footnotes Citations


Further reading

* ''Hashish!'' by Robert Connell Clarke, * ''The Hasheesh Eater'' by Fitz Hugh Ludlow; first edition 1857 * ''Marihuana The first twelve thousand years'' by Ernest L. Abel, 1980, * Starks, Michael. ''Marijuana Potency''. Berkeley, California: And/Or Press, 1977. Chapter 6 "Extraction of THC and Preparation of Hash Oil" pp. 111–122. .


External links


Bibliography of scholarly histories on cannabis and hashish

Altered States Database
{{Authority control Articles containing video clips Cannabis culture Cannabis smoking Entheogens Preparations of cannabis