nyuuzyou/wikis huggingface dataset:
Anidex fiber

== Description ==
A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 50% by weight of one or more esters of a monohydric alcohol and acrylic acid (Federal Trade Commission definition). This chemical structure imparts permanent stretch and recovery properties to the fibers. The crosslinked acrylic elastomeric fiber was commercially introduced under the trademarked name of ANIM/8 in 1970 by Rohm and Haas; the company discontinued production a short time later because it was unable to compete with the excellent properties of spandex. The fibers are still manufacturer outside of the U.S.
== Synonyms and Related Terms ==
ANIM/8® [Rohm & Haas]
== Physical and Chemical Properties ==
The fabric have dimensional stability with repeated laundering. Resistant to oxidation, sunlight, oils and bleach. Safe ironing temperature is 320. Elongation = > 500%
== Resources and Citations ==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Hoechst Celanese Corporation, Dictionary of Fiber & Textile Technology (older version called Man-made Fiber and Textile Dictionary, 1965), Hoechst Celanese Corporation, Charlotte NC, 1990
* Rosalie Rosso King, Textile Identification, Conservation, and Preservation, Noyes Publications, Park Ridge, NJ, 1985
* Marjory L. Joseph, Introductory Textile Science, Holt, Rinehart and Winston, Fort Worth, TX, 1986
* Dharma Trading [ https://www.dharmatrading.com/anidex-fiber.html Link]
Category:Materials database
Aniline

== Description ==
A colorless, oily liquid with a sweet amine-like odor. Aniline was first isolated in 1826 by Unverdorben and made synthetically in 1841 by Fritzsche. It was the base material for many of the early synthetic dyes. As a result, colors produces from coal-tar derivatives are generally called aniline dyes. Aniline darkens to brown on exposure to air and light. Besides the manufacture of dyes, aniline is used as an accelerator and antioxidant in rubbers. It is also used to make polyurethane foams, fungicides, and explosives.
== Synonyms and Related Terms ==
aminobenzene; benzenamine; phenylamine; aminophen; aniline oil; krstallin; kyanol
[[[SliderGallery rightalign|aniline.jpg~Chemical structure]]]
== Risks ==
* Highly toxic by ingestion, inhalation and skin absorption. 
* Combustible forming toxic nitrogen oxides and aniline vapor. 
* Fisher Scientific: SDS
== Physical and Chemical Properties ==
Soluble in ethanol, ether and benzene. Slightly soluble in water.
Composition 	C6H5NH2
CAS 	62-53-3
Melting Point 	-6.2 C
Density 	1.022 g/ml
Molecular Weight	mol. wt. = 93.1
Refractive Index	1.583
Boiling Point 	184-186 C
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 59
* Encyclopedia Britannica, http://www.britannica.com Comment: "aniline" [Accessed May 22, 2003].
* R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
* Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988 Comment: [http:/www.ekornes.com/stressless/leaglos1.html/ Link]
* Laboratory Safety Information: Link 
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.583
Category:Materials database
Aniline black

== Description ==
A black dye that was patented by J.Lightfoot in January 1863. Aniline black is composed of oxidized aniline hydrochloride. Fabric, such as cotton, is soaked in an aqueous solution of aniline hydrochloride and an oxidizing agent, such as chromic acid. This results in a strong black color that is not lightfast. Aniline black was also added to iron gall inks to produce a strong, initial black color. Once the aniline black faded, the iron and gallic acid color had developed a strong black tone (Kuhn 1986).
== Synonyms and Related Terms ==
Pigment Black 1; CI 50440; Oxidation Base 1; Solvent Black 5; noir d'aniline (Fr.); Anilinschwarz (Deut.); negro de anilina (Port.); azul de anilina (Esp.); anilini mayrh (Gr.); nero di anilina (It.); anilinezwart (Ned.)
[[[SliderGallery rightalign|Aniline Black, PBlk 001.TIF~FTIR (MFA)]]]
== Resources and Citations ==
* H.Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986.
* A.Scharff, 'Synthetic dyestuffs for textiles and their fastness to washing', ICOM-CC Preprints Lyon, Getty Conservation Institute, Los Angeles, 1999
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Aniline blue

== Description ==
1) A bright, blue synthetic triarylmethane dye. Aniline blue was first made from coal-tar derivatives by Girard and de Laire and patented in January 1861. The blue color is formed by heating magenta in the presence of excess aniline. Aniline blue is used as a dye and stain. 
2) The sodium salt of the same compound is called water soluble aniline blue. Aniline Blue WS is used as in inks and dyes (wool, nylon, leather, and paper).
== Synonyms and Related Terms ==
1: CI 42780; Solvent Blue 3; roseaniline blue; rosaniline blue; Bleu de Lyon; Anilinblau (Deut.); bleu d'aniline (Fr.); colorante de anilina (Esp.); mple anilinh (Gr.); blu d'anilina (It.); aniline blauw (Ned.); azul de anilina (Port.); Spirit Blue; CAS# 8004-91-9; China blue; Ink Blue A; Calcoid Blue B; Acid Blue R; 2: CI 42775; Acid Blue 22; aniline blue WS; soluble blue; CAS # 28631-66-5; Water Blue 2B;
== Risks ==
* Contact may cause irritation. 
* Toxic by ingestion causing hemoglobinemia. 
* ThermoFisher: SDS
== Physical and Chemical Properties ==
pH indicator range = 10.0 (blue)-13.0 (orange)
Composition 	1) C32H27N3O9S3
CAS 	1) 8004-91-9
Molecular Weight	2) 737.75
== Comparisons ==
Characteristics of Common Blue Pigments
==Resources and Citations==
* A.Scharff, 'Synthetic dyestuffs for textiles and their fastness to washing', ICOM-CC Preprints Lyon, Getty Conservation Institute, Los Angeles, 1999
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* Thomas B. Brill, Light Its Interaction with Art and Antiquities, Plenum Press, New York City, 1980
* F. Crace-Calvert, Dyeing and Calico Printing, Palmer & Howe, London, 1876
* Conservation termlist: www.hants.org.uk/museums
* Colour Index International online at www.colour-index.org Comment: Gives: CAS# 8004-91-9 for compound and CAS # 28631-66-5 for sodium salt
* Sigma Dyes, Stains and Natural Pigments, Infrared Library, Nicolet, 1991-1995 Comment: OMNIC: Formula=C32H27N3O9S3, CAS#=28631-66-5
Category:Materials database
Aniline brown

== Description ==
A synthetic brown dye prepared by oxidizing rosaniline. Aniline brown was first made by Jacobson. It directly forms a red color with silk and a brown color with wool.
== Physical and Chemical Properties ==
Insoluble in water
== Resources and Citations ==
* F. Crace-Calvert, Dyeing and Calico Printing, Palmer & Howe, London, 1876
Category:Materials database
Aniline dye

== Description ==
Any of a group of dyes derived from aniline which is a coal-tar distillation product. Aniline dyes were the first synthetically produced basic dyes. The method for the production of mauve (mauveine) was discovered in 1856 in England by William Perkin. This quickly spawned a new area of research into triphenylmethane dyes from which the second aniline based dye, magenta (fuchsin), was discovered. By 1861, many colors were being synthesized ranging from yellow to red to blue. These colors are very brilliant but many lack the permanence of inorganic pigments. In spite of this, they are still used in watercolors, inks and fabric dyes. See also aniline green, Aniline yellow, aniline brown, and aniline black.
== Synonyms and Related Terms ==
aniline colors; coal tar colors; coal-tar colors; rojo de anilina (Esp.); colorants à l'aniline (Fr.); colorante all'anilina (It.); corante de anilina (Port.) 
Examples include: mauve (aniline violet); fuchsin; methylgreen; aniline blue; magenta (aniline red);
== Risks ==
Most are toxic. Contact can cause irritation to skin and membranes.
Suspected carcinogen.
== Resources and Citations ==
* Colorants Industry History at colorantshistory.org
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* Hoechst Celanese Corporation, Dictionary of Fiber & Textile Technology (older version called Man-made Fiber and Textile Dictionary, 1965), Hoechst Celanese Corporation, Charlotte NC, 1990
* Boise Cascade Paper Group, The Paper Handbook, Boise Cascade, Portland OR, 1989
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Website: http://www.smith.edu/hsc/silk/Papers/meredith.html
Category:Materials database
Aniline formaldehyde resin

== Description ==
A thermoplastic resin prepared from the reaction of aniline and formaldehyde. Aniline formaldehyde resins are used in molded products and as adhesives in laminated construction materials, such as plywood.
== Synonyms and Related Terms ==
aniline-formaldehyde resins
==Resources and Citations==
* Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
Category:Materials database
Aniline green

== Description ==
A deep green dye patented by Calvert, Clift and Lowe in 1860. Aniline green is prepared by treating aniline with potassium chlorate. Several variations of green dyes prepared from aniline are generally known as aniline greens, such as iodine green, methyl green, and aldehyde green.
== Synonyms and Related Terms ==
emeraldine
== Resources and Citations ==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* F. Crace-Calvert, Dyeing and Calico Printing, Palmer & Howe, London, 1876
Category:Materials database
Aniline ink

== Description ==
A general name for a fast drying printing ink. Aniline ink originally referred to inks prepared from an aniline dye dissolved in alcohol and bound with a resin. The ink was used for printing paper, cotton, cellophane, and polyethylene. However, because of the poor lightfastness of aniline dyes, many aniline inks currently contain other types of more permanent colorants.
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
Category:Materials database
Aniline leather

== Description ==
A brightly colored leather prepared with aniline dyes. Aniline leather did not have a painted surface, but rather were colored throughout the thickness of the hide. Made since the latter part of the 19th century, aniline leathers are still used for upholstery.
== Synonyms and Related Terms ==
aniline hide; piel teñida con anilina (Esp.); curtido tingido com anilina (Port.)
== Resources and Citations ==
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Howard L. Needles, Handbook of Textile Fibers, Dyes & Finishes, Garland Publishing Co., New York, 1981
Category:Materials database
Aniline red

== Description ==
A monoazo red dye composed of chlorinated-p-nitroaniline. Aniline Red was discovered by Herzberg and Spengler in 1907. The bright red colorant is approved for use in drugs and cosmetics. It is also used in inks, enamels, paper, plastics, and opaque paints. 
See also magenta.
== Synonyms and Related Terms ==
magenta; fuchsin; D & C Red 36; CI Pigment Red 4; CI 12085; Permanent Red R; Fast Red R; rouge d'aniline (Fr.); rosso d'anilina (It.); vermelho de anilina (Port.)
== Risks ==
* May contain carcinogenic impurities.
== Physical and Chemical Properties == 
Composition	C20H0N3HCl
CAS 	2814-77-9
==Resources and Citations==
* Monona Rossol, The Artist's Complete Health and Safety Guide, Allworth Press, New York, 1994
* Colour Index International online at www.colour-index.org
Category:Materials database
Aniline sulfate

== Description ==
A toxic, white powder that is prepared by heating aniline with sulfuric acid. A 1% solution of aniline sulfate can be used as a reagent for the detection of mechanical pulp paper. Lignin containing fibers, such as groundwood or jute, give a positive yellow color reaction. Cotton, linen, and hemp turn the solution brown. A pink color is a positive reaction for the presence of esparto grass (Roberts and Etherington 1982).
== Synonyms and Related Terms ==
aniline sulphate (Br.)
[[[SliderGallery rightalign|aniline sulfate.jpg~Chemical structure]]]
== Risks ==
Toxic by inhalation, ingestion and skin contact. Very toxic to aquatic organisms. Light sensitive. Hygroscopic. Combustible. 
Fisher Scientific: MSDS
== Physical and Chemical Properties ==
Soluble in water.
Composition 	(C6H5NH2)2-H2SO4
CAS 	542-16-5
Density 	1.38 g/ml
Molecular Weight	mol. wt. = 284.33
==Resources and Citations==
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 11687
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
* Aldrich Chemical Catalog
Category:Materials database
Animal black

== Description ==
An impure black carbon pigment prepared from burnt animal bones. Animal black, or bone black, contains about 10% carbon along with 84% calcium phosphate with smaller amounts of magnesium phosphate and calcium carbonate. The blue-black pigment is denser than carbon black and has a good working quality for oil paints and watercolors. It is also used in engraving inks and as a decolorizing agent for refining sugars and syrups. A fine particle grade of bone black is now sold as ivory black and an inferior grade has been sold under the name of Paris black. Drop black is dried lumps formed after bone black is mixed with water and glue. Drop black was commonly used in the 19th century for house paints.
== Synonyms and Related Terms ==
Pigment Black 9; CI 77267; norsunluumusta (Fin.); noir d'os (Fr.); noir d'ivoire (Fr.); noir animal (Fr.); negro de huesos (Esp.); negro marfil (Esp.); nero d'avorio (It.); nero animale (It.) nero d'ossa (It.) carbone animale (It.); Beinschwarz (Deut.); Elfenbeinschwarz (Deut.); Knochenschwarz (Deut.); ivoorzwart (Ned.); elfenbensort (Nor.); negro animal (Port.); animal charcoal; abaiser; bone black; ivory black; drop black; Frankfort black; German black; Paris black
== Risks ==
No significant hazards.
== Physical and Chemical Properties ==
Particles irregularly shaped. Refractive Index = 1.65-1.70
== Resources and Citations ==
* R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Monona Rossol, The Artist's Complete Health and Safety Guide, Allworth Press, New York, 1994
* Website: http://www.coloria.net/varita.htm - foreign language equivalent terms
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 108
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
* Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Animal fat

== Description ==
A semisolid mixture of long chain hydrocarbon fatty acids obtained from animals. Animal fats are primarily composed of the glycerides of oleic acid (42-53%), palmitic acid (20-28%), stearic acid (6-13%), linoleic acid (8-13% and myristic acid (0.2-2.0%) (Serpico and White 2000). Fats are obtained from animal parts by extraction with either boiling water, steam, or organic solvents. Examples are bone fat, lard, tallow, lanolin, and butterfat.
== Synonyms and Related Terms ==
stearin; lard; tallow; lanolin; grasa animal (Esp.); graisse animale (Fr.); grasso animale (It); bone fat; butter fat
==Physical and Chemical Properties==
Density	0.94
== Resources and Citations ==
* M.Serpico, R.White, "Oil, fat and wax" in Ancient Egyptian Materials and Technology, P.Nicholson, I.Shaw (eds.), Cambridge University Press, 2000, p. 390-429.
* Ancient Egyptian Materials and Technologies, Paul Nicholson, Ian Shaw (eds.), Cambridge University Press, Cambridge, 2000 Comment: M.Serpico, R.White, "Oil, fat and wax"
* Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9211
* Matte Paint: Its history and technology, analysis, properties and conservation treatment, Eric Hansen, Sue Walston, Mitchell Bishop (ed.), J. Paul Getty Trust, Los Angeles, Vol. 30 of AATA, 1993
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: density=0.94
Category:Materials database
Animal fibers

== Description ==
Any fiber obtained from animal sources. Examples are Alpaca, Angora, Camel, cashmere, mohair, Silk, vicuna, and wool. In general, animal fibers do not burn as readily as vegetable fibers. Instead, animal fibers tend to char and emit mildly nitrogenous odors characteristic of burnt hair. Except for silk, all animal fibers can be microscopically characterized by their tiny surface scales and center shaft (cortex).
See FRIL for microscopic images of animal fibers.
== Synonyms and Related Terms ==
animal fibres (Br.); fibras animales (Esp.); fibre animale (Fr.); dierlijke vezels (Ned);
== Physical and Chemical Properties ==
* Does not burn readily. 
* Dissolves in strong alkalis. 
* Fibers have tiny surface scales and center shaft
== Comparisons ==
==Resources and Citations==
* Wikipedia: https://en.wikipedia.org/wiki/Animal_fiber (Accessed October 13, 2020)
* M.Goodway "Fiber Identification in Practice" JAIC 26:27-44, 1987. LINK
* Hoechst Celanese Corporation, Dictionary of Fiber & Textile Technology (older version called Man-made Fiber and Textile Dictionary, 1965), Hoechst Celanese Corporation, Charlotte NC, 1990
* S.R.Trotman, E.R. Trotman, Textile Analysis, J.B. Lippincott Company, Philadelphia, 1932
Category:Materials database
Animal oil

== Description ==
A liquid mixture of long chain hydrocarbon fatty acids obtained from animals. Animal oils are primarily composed of the glycerides of unsaturated fatty acids along with small amounts of cholesterol. Most animal oils are dark color liquids with an unpleasant smell. Examples are fish oil, neats-foot oil, lard oil, bone oil, sperm oil, or cod liver oil.
== Synonyms and Related Terms ==
aceite de origen animal (Esp.)
Examples include: Dippel oil; bone oil; hartshorn oil; Jeppel's oil; neatsfoot oil; lard oil; sperm oil; cod-liver oil; fish oil
==Resources and Citations==
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
* Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* Matte Paint: Its history and technology, analysis, properties and conservation treatment, Eric Hansen, Sue Walston, Mitchell Bishop (ed.), J. Paul Getty Trust, Los Angeles, Vol. 30 of AATA, 1993
Category:Materials database
Animal skin

== Description ==
The raw or dressed skin of a small animal such as a pig, goat, sheep, or calf. A freshly slaughtered skin contains about 65% water and 33% protein (Kuhn 1986). Small amounts of other materials, such as fats, carbohydrates, and minerals, are also present. Tanning chemically changes the skin and makes it resistant to putrefaction (see leather and parchment). 
See also buckskin, calfskin, capeskin, deerskin, doeskin, fish skin, goatskin, hide, kangaroo skin, kidskin, lambskin, lizard skin, moleskin, pigskin, salmon skin, sealskin, sharkskin, sheepskin, and snakeskin.
For more information on animal skin structure, leather preparation, skin identification, and leather deterioration, please see: AIC Wikis for the Book and Paper Group: Animal Skin and Leather and the Objects Group Leather and Skin
== Synonyms and Related Terms ==
skin; hide; piel (Esp.); cuero animal (Esp.); pele animal (Port.); huid van een dier of dierenhuid (Ned);
== Resources and Citations ==
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
Category:Materials database
Animal wax

== Description ==
Any of several waxes obtained from animal sources. The typical animal wax, such as from a mammal, contains no glycerides, and is found in small deposits in many parts of the animal. These waxes contain sterols (cholesterol) and other long-chain alcohols. Also included in this section are the waxes from insects such as the lac insect which produces shellac. Lac wax is a hard strong wax which resembles carnauba wax. Chinese insect wax is a good substitute for beeswax.
== Synonyms and Related Terms ==
cera de origen animal (Esp.); cera animale (It)
Examples include: spermaceti; lac wax; ear wax; Chinese insect wax; stearic acid; wool wax; lanolin; shellac wax
== Comparisons ==
==Resources and Citations==
* R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
* Matte Paint: Its history and technology, analysis, properties and conservation treatment, Eric Hansen, Sue Walston, Mitchell Bishop (ed.), J. Paul Getty Trust, Los Angeles, Vol. 30 of AATA, 1993
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database