nyuuzyou/wikis huggingface dataset:
Ionomer resin

== Description ==
A transparent, electrically conductive, thermoplastic polymer. Ionomer resins are primarily composed of ethylene copolymerized with small amounts of vinyl and acid (such as methacrylic acid) groups. The copolymer has both covalent and ionic bonds. Ionomers crosslink to form a plastic that is resistant to abrasion, breaking, and chemicals. They are used for break-resistant bottles, vacuum packaging, protective equipment, insulation, sporting goods, and foamed sheets.
[[[SliderGallery rightalign|aaiIONOMER.jpg~FTIR]]]
== Synonyms and Related Terms ==
resina ionomérica (Esp.); Surlyn® [DuPont]
==Resources and Citations==
* Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
* 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
* Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Irganox

== Description ==
[Ciba-Geigy] A brand name for a series of antioxidants. In the 1970s, Irganox 565 was occasionally used as a stabilizer in dammar varnishes for paintings. Later studies concluded that Irganox produced yellow decomposition products when exposed to ultraviolet light. Thus its exposure to UV should be minimized.
* Irganox 565:
* Irganox 1010: primarily contains - tetrakis(methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamate))methane; CAS 6683-19-8; m.p 110-125C
* Irganox 1076: primarily contains - 3,5-di-tert-butyl-4-hydroxyhydrocinnamate; CAS 2082-79-3; m.p. 50-55C
== Synonyms and Related Terms ==
Irganox 565; Irganox 1010; Irganox 1076
[[[SliderGallery rightalign|aaiIRGANOX.jpg~FTIR]]]
==Resources and Citations==
* J.Bourdeau, "Using UV Absorbers in Acrylic Top Coats as a Remedial Treatment for Damar Varnishes Containing Irganox 565"
Category:Materials database
Iridescence

== Description ==
The shimmery color effect seen on butterfly wings, soap bubbles, or with a thin oil film on water. Iridescence is caused by the diffraction of light between two adjacent materials with different refractive indices. Devitrified glass sometimes has an iridescent sheen due to the thin surface scales.
== Synonyms and Related Terms ==
iridescent
== Additional Images ==
File:BlueMorph_Butterfly_irrid_wik.jpg|Iridescent butterfly wings
File:02 Irid.Pearl_fine 200x Refl.jpg|Iridescent Pearl (fine)
File:Soap_Bubble_-_foliage_background_-_iridescent_colours_-_Traquair_040801.jpg|Soap bubbles
== Resources and Citations ==
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* Wikipedia: http://en.wikipedia.org/wiki/Iridescence
Category:Materials database
Iridescent glass

== Description ==
Any glass with a shimmery iridescent surface. Iridescent glass was first made in 1863 by Llobmeyr. It is made by one of three types of processes: 
* The glass is placed in a reducing flame to reduce oxides near the surface to their metallic state. 
* The glass in placed in a sealed container with metallic salt fumes. Stannous chloride is most often used. 
* The glass is painted with a thin metallic luster paint then fired. The metallic luster paint was composed of a metallic salt in a natural resin binder. 
Iridescent glass was used by Tiffany and other art glass companies. The most popular type of iridescent glass was mother-of-pearl. It was made with a thin coating of bismuth.
== Synonyms and Related Terms ==
iriserend glas (Ned.); vidro iridescente (Port.)
==Resources and Citations==
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
Category:Materials database
Iridescent paper

== Description ==
A decorative paper with an iridescent surface. Patents were issued in 1855, 1864 and 1866 for the preparation of iridescent paper by floating glazed paper in a bath of silver or lead salts, then exposing the dried paper to hydrogen sulfide gas. An alternative procedure was to soak the paper in a solution of gum, iron sulfate, sulfate of indigo and nutgalls then expose the dried paper to ammonia fumes. Today, iridescent paper is produced by special printing techniques and dyes.
== Synonyms and Related Terms ==
mother-of-pearl paper; nacreous paper; opalescent paper
Category:Materials database
Iridium

== Description ==
A dense, hard metallic element discovered by Smithson Tennant in 1803. Iridium is a rare element that has an abundance of 0.001 ppm in the earth's crust. It is found as a native metal alloyed with osmium, platinum, or gold. Iridium deposits have been found in Canada, South Africa, Russia and the U.S. (Alaska). The white, hard metal is insoluble in acids and does not tarnish in air. Iridium is used to harden platinum. It is also used in jewelry, weight standards, precision instruments, surgical tools, pen points, electrical contacts, and wear-resistant bearings.
== Synonyms and Related Terms ==
Ir; iridio (It., Esp.); Irídio (Port.)
== Risks ==
* Flammable solid. 
* Pyrophoric. 
* Spontaneously flammable in air. 
* Contact causes irritation. 
* Fisher Scientific: MSDS
==Physical and Chemical Properties==
Resistant to acids. Slowly soluble in fused alkalis.
Composition 	Ir (atomic no. 77)
CAS 	7439-88-5
Mohs Hardness 	6.5
Melting Point 	2410 C
Density 	22.42 g/ml
Molecular Weight	atomic wt = 192.217
Boiling Point 	4310 C
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 5098; discovered 1804 by Tennant
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* Web Elements at http://www.webelements.com/webelements/elements/text/Ir/hist.html gives discovered in 1803 by Smithson Tennant, Antoine Fourcroy, Louis Vanquelin, Hippolyte Collet-Descotils
* Chemical & Engineering News, American Chemical Society, Washington DC, 81 (36) , Sept. 8, 2003 Comment: Richard Eisenberg, p. 148: discovered in 1803 by Smithson Tennant
Category:Materials database
Iris green

== Description ==
An obsolete organic green colorant extracted from the crushed flowers of iris or lilies. The clear green color was precipitated on alumina trihydrate and used in manuscript painting. Iris green was replaced in the 17th century by sap green which was made from unripe buckthorn berries. The color of the two materials were similar and the name, iris green, was sometimes used for the sap green extract.
== Synonyms and Related Terms ==
sap green; lily green; lilly green
==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)
* R.D. Harley, Artists' Pigments c. 1600-1835, Butterworth Scientific, London, 1982
* Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Irish moss

== Description ==
A small brown seaweed, Chondrus crispus, that grows in North Atlantic and is collected on the beaches of Ireland, Great Britain, Northern European countries, Nova Scotia, Massachusetts and other New England States. A water-soluble polysaccharide, called carrageenan, is extracted from Irish moss with boiling water.
== Synonyms and Related Terms ==
Chondrus crispus; carrageen moss; carragenano (Esp.); Muschio d'Irlanda (It); lichene d'Irlanda (It); carragheen; carrageenan; carrageenin
== Resources and Citations ==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 20
* S.R.Trotman, E.R. Trotman, Textile Analysis, J.B. Lippincott Company, Philadelphia, 1932
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
Category:Materials database
Iroko

== Description ==
A wood produced from the Chlorophor excelsa tree native to Africa. Iroko is a medium weight wood with an open-grain texture. The color is a brown with yellow streaks. Iroko has been used for structures, ship building, cabinets, and furniture.
== Synonyms and Related Terms ==
Chlorophor excelsa; mvule; African teak; iroko (Fr.); câmbala (Port.)
== Risks ==
* Susceptible to wood borers. 
* Skin contact may cause irritation.
==Physical and Chemical Properties==
* Heartwood is yellow to golden with dolor darkening over time; sapwood is a clearly paler yellow
* Grain is interlocked with open pores and a medium to coarse texture
* Wood is durable and sometimes used as a substitute for teak
* Density = 41 ppcf
==Working Properties==
* Generally easy to work, with the exception of its interlocked grain, which may cause some tearout during surfacing operations
* Deposits of calcium carbonate are sometimes present, which can have a significant dulling effect on cutters
* Glues and finishes well.
==Resources and Citations==
* The Wood Database: Iroko
* F. H. Titmuss, Commercial Timbers of the World, The Technical Press Ltd., London, 1965 Comment: 41 ppcf
* Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: density=61 ppcf (0.98 g/cm3)
Category:Materials database
Iron acetates

== Description ==
Dark red (ferrous acetate) and light green (ferric acetate) colorants used in the 19th century on leather bindings (Roberts and Etherington, 1982).
== Synonyms and Related Terms ==
ferrous acetate; ferric acetate
==Resources and Citations==
* 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
Iron arsenosulfide

== Description ==
Silvery gray crystals or masses. Iron arsenosulfide, or arsenopyrite, is the most common ore of arsenic. It is found in Mexico (Mapimí), Sweden (Tunaberg) and the U.S. (Montana). As the ore weathers the sulfides are converted to oxides and the stone takes on a tarnished appearance.
== Synonyms and Related Terms ==
iron arsenopyrite; pyrite; arsenical pyrite; arsenopyrite; white metal; mispickel
==Physical and Chemical Properties==
Composition	FeSAs
==Resources and Citations==
* Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
* Encyclopedia Britannica, http://www.britannica.com Comment: "arsenopyrite" [Accessed October 23, 2001].
Category:Materials database
Iron chromate

== Description ==
A yellow powder occasionally used as a pigment called siderin yellow. Iron chromate is precipitated from a solution of a chromate salt, such as potassium dichromate by the addition of ferric chloride. The pure pigment is bright yellow, but some residual impurities, such as iron oxide, may result in a dull orange pigment color. Siderin yellow is compatible with all paint binders. Iron chromate produces a gray ceramic glaze when used in concentrations of 0.5-2.0%, while it produces a brown glaze color when mixed with zinc. It has also been used as as a colorant in glass and enamel.
== Synonyms and Related Terms ==
siderin yellow; Pigment Yellow 45; CI 77505; chromate de fer (Fr.); cromato de ferro (Port.); chromate of iron; ferric chromate
== Risks ==
* Human carcinogen. 
* Skin contact may cause allergies. Acute ingestion may cause fatal chromium poisoning. 
* Chronic inhalation may cause lung cancer and respiratory irritation.
* ThermoFisher: SDS
== Physical and Chemical Properties ==
Soluble in acids. Insoluble in water, and ethanol.
Composition 	Fe2(CrO4)3
CAS 	10294-52-7
Molecular Weight	mol. wt. = 459.73
==Resources and Citations==
* H. Kuhn, M.Curran, "Chrome Yellow and Other Chromate Pigments", Artists Pigments, Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.
* Robert Fournier, Illustrated Dictionary of Practical Pottery Chilton Book Company, Radnor, PA, 1992.
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
Category:Materials database
Iron dichromate

== Description ==
A reddish-brown crystalline material occasionally used as a transparent pigment in oil and watercolor paints. Iron dichromate is prepared by heating ferric hydroxide in chromic acid or by mixing potassium chromate with iron sulfate.
== Synonyms and Related Terms ==
basic iron chromate; ferric dichromate; dicromato de ferro (Port.)
== Risks ==
* Human carcinogen. 
* Skin contact may cause allergies. 
* Acute ingestion may cause fatal chromium poisoning. 
* Chronic inhalation may cause lung cancer and respiratory irritation.
* ThermoFisher: SDS
==Physical and Chemical Properties==
Soluble in water and acids.
Composition	Fe2(CrO7)3
==Resources and Citations==
* H. Kuhn, M.Curran, "Chrome Yellow and Other Chromate Pigments", Artists Pigments, Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
Category:Materials database
Iron disulfide

Primarily occurs as a yellowish mineral with a metallic luster called pyrite. Iron disulfide also occurs as that mineral marcasite. Major sources for iron pyrite include sites in India, Turkey, and Russia. It was called fool's gold because its color and metallic sheen often is mistake for gold. Polished pieces of iron pyrite have been used for necklaces and bracelets. Ethanolamine thioglycollate treatments have been used to minimize the decomposition of pyritic specimens (Cornish 1984). 
See also pyrrhotite.
== Synonyms and Related Terms ==
iron (II) disulfide; iron pyrite; pyrite; fool's gold; martial pyrite; mundic; factitous pyrite; Pyrit (Deut.); pyrite (Fr.); pyriet (Ned.); piryt (Pol.); pirita (Port.);
[[[SliderGallery rightalign|pyriteRS.jpg~Raman (RASMIN)|Pyriteitaly2.jpg~Raman (U of Parma)|Pyrite Raman RRUFF R050190.png~Raman (RRUFF)]]]
== Risks ==
* Can evolve low levels of sulfur dioxide. 
* Degrades in high humidity environments.
* ThermoFisher: SDS
== Physical and Chemical Properties ==
* Insoluble in water 
* Magnetic after heating 
* Crystal system = isometric 
* Cleavage = poor 
* Fracture = uneven 
* Luster = metallic 
* Streak = greenish black to brown
Composition 	FeS2
CAS 	1309-36-0
Mohs Hardness 	6.0 - 6.5
Melting Point 	1171-1188 C
Density 	4.9-5.1 g/ml
Molecular Weight	mol. wt. = 119.967
=Resources and Citations==
* L. Cornish, A.M. Doyle. "Use of Ethanolamine Thioglycollate in the Conservation of Pyritised Fossils" Palaeontology 27(2), 1984, 421-424.
* Gem Identification Lab Manual, Gemological Institute of America, 2016.
* WebMinerals: Pyrite
* C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: density=4.95-5.1
* Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
* Jon Byler, Submitted information, Jan. 23, 2006. melting point = 1171 C (Lange's Handbook 1985), melting point=1188C (CRC 78th ed.)
* Wikipedia: Pyrite (Accessed Sept. 14, 2005 andDec 2022)
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 422
* Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
Category:Materials database
Iron gall ink

== Description ==
A black ink predominantly used from the 9th century until it was replaced by synthetic inks in the late 19th century. Iron gall inks contain ferrous sulfate and gall extracts (gallotannic acid and gallic acid) in an aqueous solution of gum arabic. Gallotannic acid reacts with iron in solution to form iron gallotannate. The brown solution is used as an ink. As it dries on the paper or parchment, the ink oxidizes to a permanent deep blue-black color. Lampblack, logwood (red), indigo (blue), or later, aniline black, colorants were sometimes added to the ink to provide an initial dark color. Over time, iron gall inks can interact with paper causing severe degradation. Citric acid, oxalic acid, and potassium oxalate have been mentioned as sequestering agents to remove iron gall inks, but any addition of an acid to degraded paper or parchment is not recommended. Calcium phytate has be used as a chelating agent.
== Synonyms and Related Terms ==
iron gallotannate; Eisengallustinte (Deut.); Gallustinte (Deut.); encre ferrogallique (Fr.); sidirogalliko melani (Gr.); inchiostro metallo gallico (It.); inchiostro di noce di galla (It.); ijzergallusinkt (Ned.); tinta ferrogálica (Port.); ferric tannate; iron tannate; acid ink; iron-gall ink; iron-gall nut ink
[[[SliderGallery rightalign|Iron gall ink (primarily gallic acid).PNG~FTIR (MFA)]]]
== Physical and Chemical Properties ==
Iron-gallotannate is insoluble in water, ethanol, ether Some colored additives may be soluble in water and organic solvents.
== Resources and Citations ==
* Reissland, Birgit and Frank Ligterink (2011) The Iron Gall Ink Website Maintained by the Cultural Heritage Agency of the Netherlands.
* The Ink Corrosion Website at http://www.knaw.nl/ecpa/ink/intro.html
* R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* A Glossary of Paper Conservation Terms, Margaret Ellis (ed.), Conservation Center of the Institute of Fine Arts, New York City, 1998
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Wikipedia: http://en.wikipedia.org/wiki/Iron_gall_ink (Accessed Jan. 25, 2006)
* AMOL reCollections Glossary - http://amol.org.au/recollections/7/i/htm
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Iron oxide black

== Description ==
A brownish-black iron ore. Black iron oxide is used in the manufacture of steel, glass and enamels. It has coarse particles that are strongly magnetic. Black iron oxide wets easily but it covers poorly and is unsuited for most use in paints. However, it is used to tint primers gray because it is inert and inexpensive.
== Synonyms and Related Terms ==
ferrous oxide; Pigment Black 11; CI 77499; negro de óxido de hierro (Esp.); Schwarzes Eisenoxid, natürlich (Deut.); magnétite (Fr.); oxeidio toy sidiroy (Gr.); mayro (fysiko) magnititis (Gr.); nero ossido di ferro (It.); ijzeroxide zwart (Ned.); negro de óxido de ferro (Port.); black iron oxide; magnetic oxide; Mars black; mineral black; black rouge.
== Risks ==
No significant hazards unless contaminated with toxic impurities.
== Physical and Chemical Properties ==
Turns a dark reddish brown when heated.
Composition = FeO
Category:Materials database
Iron oxide red

== Description ==
Iron oxides produce a wide variety of red shades ranging from light, bright red to a deep purplish red. They can be natural, earth pigments (hematite, Indian red, Venetian red) or synthetically prepared pigments (light red). All iron oxide reds are stable, permanent pigments with good tinting strength and are the primary colorant in ochers and siennas.
== Synonyms and Related Terms ==
Pigment Red 101; CI 77491; red iron oxide; red ocher; red ochre (Br.); pozzuolana (It.); terra di Pozzuoli (It.); hématite (Fr.); oxyde fer rouge (Fr.); bengara (Jap.); benigara (Jap.); Roter Ocker (Deut.); Hämatit (Deut.); hematita (Port.); oxeidio toy sidiroy (Gr.); kokkino (Gr.); aimatitis (Gr.); ematite (It.); ijzeroxide rood (Ned.); vermelho de óxido de ferro (Port.); haematite; hematite; Indian red; caput mortuum; rouge; Persian red; Tuscan red; Pompeian red; light red; Venetian red; terra Pozzuoli; English red; angel red
== Chemical and Physical Properties ==
Composition 	Fe2O3
Mohs Hardness 	5.5 - 6.5
Density 	4.2-5.3 g/ml
Refractive Index	2.78; 3.01
[[[SliderGallery rightalign|Hematite crystals, large (Forbes MFA 70) 50X resize.tif~Raman (MFA)|MFA- Red oxide, Spanish, natural.jpg~FTIR|PIG72.jpg~XRD|fkhaemsem.jpg~SEM|fkhaemedsbw.jpg~EDS]]]
== Comparisons ==
== Resources and Citations ==
* Pigments Through the Ages - http://webexhibits.org/pigments/indiv/overview/redochre.html
* The Dictionary of Art, Grove's Dictionaries Inc., New York, 1996 Comment: "Pigments"
* R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
* R.Feller, M.Curran, C.Bailie, 'Identification of Traditional Organic Colorants Employed in Japanese Prints and Determination of their Rates of Fading', Japanese Woodblock Prints, Allen Memorial Art Museum, Oberlin College, Oberlin, 1984
* Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
* Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Iron pigments

== Description ==
A general term for iron containing pigments. Iron oxide pigments are yellow, red or brown (Mars red, raw umber, raw sienna, burnt sienna). Prussian blue, ferric ferrocyanide, falls into this category and is often called iron blue.
== Synonyms and Related Terms ==
pigmentos de hierro (Esp.); pigments à base de fer (Fr.); pigmentos de ferro (Port.)
Category:Materials database
Iron stain

== Description ==
A reddish iron oxide stain caused by rusted iron or steel. Weak acids, such as citric acid and oxalic acid, have been used to dissolve rust.
== Synonyms and Related Terms ==
iron oxide; rust stain; iron mold
==Resources and Citations==
* AIC Wiki: Book and Paper: Stain reduction
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
Category:Materials database
Iron yellow

== Description ==
A common name for a yellow pigment made from synthetic iron hydroxide. 
See Mars yellow, goethite, and ferric hydroxide.
== Synonyms and Related Terms ==
Mars yellow; ferric hydroxide
==Resources and Citations==
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
Category:Materials database