Blotting paper, called bibulous paper, is a highly absorbent type of paper or other material. It is used to absorb an excess of liquid substances (such as ink or oil) from the surface of writing paper or objects. Blotting paper referred to as bibulous paper is mainly used in

microscopy Microscopy is the technical field of using microscopes to view objects and areas of objects that cannot be seen with the naked eye (objects that are not within the resolution range of the normal eye). There are three well-known branches of micr ...

to remove excess liquids from the slide before viewing. Blotting paper has also been sold as a cosmetic to aid in the removal of skin oils and makeup.

Manufacture

Blotting paper is made from different materials of varying thickness, softness, etc. depending on the application. It is often made of cotton and manufactured on special paper machines. Blotting paper is reputed to be first referred to in the English language in the 15th century but there is a tradition in Norfolk, England that it was invented by accident at Lyng Mill on the River Wensum. It is reported that a

Berkshire Berkshire ( ; in the 17th century sometimes spelt phonetically as Barkeshire; abbreviated Berks.) is a historic county in South East England. One of the home counties, Berkshire was recognised by Queen Elizabeth II as the Royal County of Berk ...

(England) paper mill worker failed to add

sizing Sizing or size is a substance that is applied to, or incorporated into, other materials—especially papers and textiles—to act as a protective filler or glaze. Sizing is used in papermaking and textile manufacturing to change the absorption ...

to a batch of paper that was being produced. The batch was discarded. Subsequently, someone tried to write on a piece of this discarded "scrap" paper and found that it rapidly absorbed any ink applied, making it unusable for writing. Its marked absorbency having been noted, however, led to its subsequently being produced and used as blotting paper, replacing sand, which was the material that had been used for absorbing superficial wet ink. In a time when most paper was produced from "rags", red/pink rags, from which it was difficult to remove all color and had generally been discarded, were now directed to the production of blotters, hence the historically characteristic pink color of blotters.

Applications

Art

A form of blotter paper commonly known as watercolor paper is produced for its absorbent qualities, allowing much better absorption of water and pigments than standard art or drawing papers. Although usually categorized as separate from blotting paper, differences in the constituents and thickness of blotting paper and watercolor paper are subtle, and making a distinction between the two is unnecessary as the production process is nearly identical.

Chemical analyses

Blotting paper is used in

chemical analyses A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., wit ...

as stationary phase in thin-layer chromatography. Blotting paper is also used in pool/spa maintenance to measure pH balance. Small squares of blotting paper attached to disposable plastic strips are impregnated with pH sensitive compounds usually extracted from

lichen A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Roccella tinctoria. These strips are used similarly to litmus strips, however filter paper is usually used for litmus strips, generally to allow for the property of diffusion.

Drugs

Drugs active in microgram range, most notably LSD, are commonly distributed illicitly on blotting paper. A liquid solution of the drug is applied to the blotting paper, which commonly is perforated into individual doses and artfully decorated with what is known as

blotter art Blotter may refer to: * ''Blotter'' (album), a 1996 album by the American band Nightstick * Blotter acid, a means of transporting and taking LSD and other psychedelic compounds * Blotting paper, used to absorb ink or oil from writing materials, ...

. Vanity blotter is blotter art that has not been exposed to LSD and is usually sold as a collectible, although inevitably much of this art ends up in illegal distribution. The artwork is printed onto blotter paper and then sometimes perforated into tiny squares or "tabs" which can be torn or cut apart. Most blotter art designs have grid lines as part of the design to either aid in perforation or to be left as a cutting grid. Blotter as a delivery method allows for easy dosing of potent substances and easy sublingual administration of drugs which has made it increasingly popular as a preparation for other potent drugs including

25I-NBOMe 25I-NBOMe (2C-I-NBOMe, Cimbi-5, Smiles and also shortened to "25I") is a synthetic hallucinogen that is used in biochemistry research for mapping the brain's usage of the type 2A serotonin receptor; it is also sometimes used for recreational pu ...

and alprazolam. Plain white LSD blotter without artwork is commonly referred to as WoW (White on White) and is usually not perforated but rather gridded with a pen and sometimes laid on commonly obtained watercolor paper.

Writing

Blotting is frequently necessary when using dip pens and occasionally when using fountain pens. This was first done by sprinkling pounce over the wet ink. When used to remove ink from writings, the writing may appear in reverse on the surface of the blotting paper, a phenomenon which has been used as a plot device in a number of detective stories, such as in the Sherlock Holmes story " The Adventure of the Missing Three-Quarter".

Cosmetics

Blotting papers are also commonly used in cosmetics to absorb excess sebum oil from the face. They are popularly marketed and have been sold by numerous cosmetic brands worldwide. The papers are often dyed, for wider market appeal, and dusted with

salicylic acid Salicylic acid is an organic compound with the formula HOC6H4CO2H. A colorless, bitter-tasting solid, it is a precursor to and a metabolite of aspirin (acetylsalicylic acid). It is a plant hormone, and has been listed by the EPA Toxic Substance ...

and minerals to actively prevent the formation of comedones and acne. However, there is a popular debate of whether blotting papers can help reduce acne by absorbing excess oil, or cause it. The quality of the blotting papers and the use of other ingredients such as mineral oils may be a determining factor.

Occult rituals

During the Renaissance in Iceland, blotting paper had a small religious significance whereas it was used as a tool for ceremonial magic. This becomes noticeable in the

Galdrabók The (, ''Book of Magic'') is an Icelandic grimoire dated to ca. 1600. It is a small manuscript containing a collection of 47 spells and sigils/staves. The grimoire was compiled by four people, possibly starting in the late 16th century and going ...

, a grimoire (magic spell book) of the time period in which the reader is directed to draw sigils on blotting paper to attain success.

Notes

References

{{DEFAULTSORT:Blotting Paper Visual arts materials Cosmetics Lysergic acid diethylamide Paper Paper products