Scouring powder is a

household A household consists of two or more persons who live in the same dwelling. It may be of a single family or another type of person group. The household is the basic unit of analysis in many social, microeconomic and government models, and is im ...

cleaning product Cleaning agents or hard-surface cleaners are substances (usually liquids, powders, sprays, or granules) used to remove dirt, including dust, stains, bad smells, and clutter on surfaces. Purposes of cleaning agents include health, beauty, removing ...

consisting of an

abrasive An abrasive is a material, often a mineral, that is used to shape or finish a workpiece through rubbing which leads to part of the workpiece being worn away by friction. While finishing a material often means polishing it to gain a smooth, reflec ...

powder mixed with a dry

soap Soap is a salt of a fatty acid used in a variety of cleansing and lubricating products. In a domestic setting, soaps are surfactants usually used for washing, bathing, and other types of housekeeping. In industrial settings, soaps are used ...

detergent A detergent is a surfactant or a mixture of surfactants with cleansing properties when in dilute solutions. There are a large variety of detergents, a common family being the alkylbenzene sulfonates, which are soap-like compounds that are m ...

, soda, and possibly dry bleach. Scouring powder is used to clean encrusted deposits on hard surfaces such as ceramic tiles, pots and pans, baking trays,

grill Grill or grille may refer to: Food * Barbecue grill, a device or surface used for cooking food, usually fuelled by gas or charcoal, or the part of a cooker that performs this function * Flattop grill, a cooking device often used in restaurants, ...

, porcelain

sink A sink is a bowl-shaped plumbing fixture for washing hands, dishwashing, and other purposes. Sinks have a tap (faucet) that supply hot and cold water and may include a spray feature to be used for faster rinsing. They also include a drain ...

bathtub A bathtub, also known simply as a bath or tub, is a container for holding water in which a person or animal may bathe. Most modern bathtubs are made of thermoformed acrylic, porcelain-enameled steel or cast iron, or fiberglass-reinforced p ...

toilet bowl A toilet is a piece of sanitary hardware that collects human urine and feces, and sometimes toilet paper, usually for disposal. Flush toilets use water, while dry or non-flush toilets do not. They can be designed for a sitting position popul ...

s and other bathroom fixtures. It is meant to be rubbed over the surface with a little water. The abrasive removes the dirt by mechanical action, and is eventually washed away, together with the powder, by rinsing with water. Scouring powders are similar to scouring soaps and scouring creams in general composition and mode of action, but differ somewhat in the form (dry powder, instead of a bar or paste) and in the primary intended applications. Scouring powders compete in their intended uses with

scouring pad A scouring pad or scourer is a small pad of metal or plastic mesh used for scouring a surface. Some scouring pads have one side made of a soft sponge-like material and the other is the aforementioned mesh. History The scouring pad has been rei ...

s and

steel wool Steel wool, also known as iron wool, wire wool or wire sponge, is a bundle of very fine and flexible sharp-edged steel filaments. It was described as a new product in 1896.''Iron Age'', Vol. LVII, p.871, cited by ''Journal of the Iron and Steel ...

Composition

A typical scouring powder consists of an insoluble abrasive powder (about 80%), a soluble base (18%) and a detergent (2%). It may also include

perfume Perfume (, ; french: parfum) is a mixture of fragrant essential oils or aroma compounds (fragrances), fixatives and solvents, usually in liquid form, used to give the human body, animals, food, objects, and living-spaces an agreeable scent. ...

and/or a dry bleaching agent. The abrasive can be

silica Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula , most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand. Silica is o ...

(quartz, ),

feldspar Feldspars are a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. The most common members of the feldspar group are the ''plagioclase'' (sodium-calcium) feld ...

(such as

orthoclase Orthoclase, or orthoclase feldspar ( endmember formula K Al Si3 O8), is an important tectosilicate mineral which forms igneous rock. The name is from the Ancient Greek for "straight fracture," because its two cleavage planes are at right angl ...

pumice Pumice (), called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough-textured volcanic glass, which may or may not contain crystals. It is typically light-colored. Scoria is another vesicular v ...

kaolinite Kaolinite ( ) is a clay mineral, with the chemical composition Al2 Si2 O5( OH)4. It is an important industrial mineral. It is a layered silicate mineral, with one tetrahedral sheet of silica () linked through oxygen atoms to one octahed ...

soapstone Soapstone (also known as steatite or soaprock) is a talc-schist, which is a type of metamorphic rock. It is composed largely of the magnesium rich mineral talc. It is produced by dynamothermal metamorphism and metasomatism, which occur in the ...

talc Talc, or talcum, is a clay mineral, composed of hydrated magnesium silicate with the chemical formula Mg3Si4O10(OH)2. Talc in powdered form, often combined with corn starch, is used as baby powder. This mineral is used as a thickening agent ...

, calcium carbonate ( limestone, chalk),

calcite Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on scra ...

, etc.. The particles should have reasonably uniform size, less than 50

μm The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Uni ...

in diameter. Hard abrasives like silica and pumice can remove tougher stains but may also scratch glass, metal, and glazed ceramics. The soluble base is meant to break down

fat In nutrition, biology, and chemistry, fat usually means any ester of fatty acids, or a mixture of such compounds, most commonly those that occur in living beings or in food. The term often refers specifically to triglycerides (triple es ...

ty substances by

saponification Saponification is a process of converting esters into soaps and alcohols by the action of aqueous alkali (for example, aqueous sodium hydroxide solutions). Soaps are salts of fatty acids, which in turn are carboxylic acids with long carbon chains ...

; it may be sodium carbonate (lye, washing soda, ). The detergent is usually an

anionic surfactant Surfactants are chemical compounds that decrease the surface tension between two liquids, between a gas and a liquid, or interfacial tension between a liquid and a solid. Surfactants may act as detergents, wetting agents, emulsifiers, foamin ...

. Its role is to help remove greasy material (such as

grease Grease may refer to: Common uses * Grease (lubricant), a type of industrial lubricant * Grease, any petroleum or fat (including cooking fat) that is a soft solid at room temperature ** Brown grease, waste vegetable oil, animal fat, grease, e ...

) as an

emulsion An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or unblendable) owing to liquid-liquid phase separation. Emulsions are part of a more general class of two-phase systems of matter called colloids. Althou ...

, and to keep the removed stain particles suspended in the abrasive paste. The dry bleach is usually a product that releases chlorine (more precisely

hypochlorite In chemistry, hypochlorite is an anion with the chemical formula ClO−. It combines with a number of cations to form hypochlorite salts. Common examples include sodium hypochlorite (household bleach) and calcium hypochlorite (a component of ble ...

, the classical household bleaching agent), such as

trichloroisocyanuric acid Trichloroisocyanuric acid is an organic compound with the formula (C3Cl3N3O3). It is used as an industrial disinfectant, bleaching agent and a reagent in organic synthesis. This white crystalline powder, which has a strong "chlorine odour," is ...

. The

Bar Keepers Friend Bar Keepers Friend is an American brand of mass-produced cleaning agents. The original canned scouring powder product has been manufactured and sold since 1882. It was invented by a chemist in Indianapolis, Indiana, where it continues to be manu ...

scouring powder has

oxalic acid Oxalic acid is an organic acid with the systematic name ethanedioic acid and formula . It is the simplest dicarboxylic acid. It is a white crystalline solid that forms a colorless solution in water. Its name comes from the fact that early inve ...

instead of the base, which makes it effective against

rust Rust is an iron oxide, a usually reddish-brown oxide formed by the reaction of iron and oxygen in the catalytic presence of water or air moisture. Rust consists of hydrous iron(III) oxides (Fe2O3·nH2O) and iron(III) oxide-hydroxide (FeO(OH), ...

stains rather than grease and other organic dirt.

History

Abrasive powders have been used to wash off grease and other hard stains since antiquity. Bathing in ancient

Greece Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders wit ...

and

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus ( legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

started with rubbing the body with fine sand mixed with oil or other substances, and then scraping it off with a special curved spatula, a

strigil The strigil ( el, στλεγγίς, translit=stlengis, probably a loanword from Pre-Greek substrate) is a tool for the cleansing of the body by scraping off dirt, perspiration, and oil that was applied before bathing in Ancient Greek and Roman ...

. The plants in the genus ''

Equisetum ''Equisetum'' (; horsetail, snake grass, puzzlegrass) is the only living genus in Equisetaceae, a family of ferns, which reproduce by spores rather than seeds. ''Equisetum'' is a " living fossil", the only living genus of the entire subclass ...

'' ("horsetails") are also called "scouring rushes" because their microscopic silica scales ( phitoliths). An early industrialized scouring powder was

Bon Ami Bon Ami () is a brand of scouring powder sold by the Bon Ami Company of Kansas City, Missouri. Since its inception in the late 19th century, the brand's advertising campaigns have gained particular notice. History 19th century The original B ...

, launched in 1886 by the J.T. Robertson Soap Company as a gentler alternative to quartz-based scouring powders then available on store shelves. Another early commercial brand was

Vim Vim means enthusiasm and vigor. It may also refer to: * Vim (cleaning product) * Vim Comedy Company, a movie studio * Vim Records * Vimentin, a protein * "Vim", a song by Machine Head on the album ''Through the Ashes of Empires'' * Vim (text ed ...

(1904), one of the first products created by

William Lever William Hesketh Lever, 1st Viscount Leverhulme , (, ; 19 September 1851 – 7 May 1925) was an English industrialist, philanthropist, and politician. Having been educated at a small private school until the age of nine, then at church schools ...

. The abrasive was obtained from sandstone mined at the Cambrian Quarry at

Gwernymynydd is a village outside the market town of Mold, Flintshire, Mold in Flintshire, Wales. It forms part of the Gwernymynydd and Cadole (sometimes shortened to ''Gwernymynydd'') Community (Wales), community. At its highest point it is 1000 feet above ...

between 1905 and about 1950. The brand is still marketed in some countries, but

Unilever Unilever plc is a British multinational consumer goods company with headquarters in London, England. Unilever products include food, condiments, bottled water, baby food, soft drink, ice cream, instant coffee, cleaning agents, energy ...

has been replacing it with Jif and then

Cif Cif is a French brand of household cleaning products owned by the Anglo-Dutch company Unilever, known as Jif in Australia, New Zealand, Japan, Middle East and the Nordic countries. Cif was launched in France in 1965 and was marketed in compe ...

. Scouring powders have been marketed with many other companies and brand names, such as

Ajax Ajax may refer to: Greek mythology and tragedy * Ajax the Great, a Greek mythological hero, son of King Telamon and Periboea * Ajax the Lesser, a Greek mythological hero, son of Oileus, the king of Locris * ''Ajax'' (play), by the ancient Gree ...

Radium Radium is a chemical element with the symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen (rathe ...

Comet A comet is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process that is called outgassing. This produces a visible atmosphere or Coma (cometary), coma, and sometimes also a Comet ta ...

, Sano, and

Zud A zud, dzud ( mn, зуд) of dzhut, zhut, djut, jut ( kz, жұт, ky, жут, russian: джут) is a disaster in steppe, semi-desert and desert regions in Mongolia and Central Asia in which large numbers of livestock die, primarily due to starva ...

References

John Toedt, Darrell Koza, and Kathleen Van Cleef-Toedt (2005):
Chemical Composition of Everyday Products
'. Greenwood Publishing; 205 pages. {{cite book , last = Room , first = Adrian , title = Dictionary of Trade Name Origins , publisher = Routledge , year = 1983 , pages
184
, url = https://archive.org/details/dictionaryoftrad00room/page/184 , isbn = 0-7102-0174-5 , url-access = registration Cleaning products Powders