nyuuzyou/wikis huggingface dataset:
Metal lath

== Description ==
A stiff metal mesh used as a support for plaster walls. Metal lathes were patented in England in 1797 and made in the U.S. after 1896. Expanded metal lath was made by punching hole patterns in sheet metal then stretching the sheet to form an open mesh. The mesh patterns varied depending on manufacturer, such as diamond, herringbone, and oblong. Metal lath provides strength and water-resistance for ceramic tile walls used in bathrooms and kitchens.
== Synonyms and Related Terms ==
expanded metal lath; Bostwick lath; diamond mesh lath; herringbone lath; oblong mesh; Truss loop lath; Trussit; rib lath
==Resources and Citations==
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
* Preservation Briefs: Brief 21
Category:Materials database
Metal leaf

== Description ==
A very thin sheet of metal. Some metals, such as gold, silver, palladium, platinum, aluminum, tin and Dutch metal (brass) are ductile enough to be beaten or rolled into very thin sheets for use in gilding.
==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
Metal point

== Description ==
A metal tool used for drawing on a paper or parchment support which has been covered by a ground. As the point moves across the ground, it leaves behind a thin layer of metal that can quickly quickly oxidize. For example, silver point becomes the brownish grey of tarnished silver and lead point becomes quite dark. The marks are permanent, and the colored ground may be more light-sensitive than the design. Metal points are also prepared from soft metals such as gold and other metals such as aluminum, antimony, brass, bronze, copper, nickel, palladium, platinum, tin, or zinc, that produce distinct marks from the direct deposition of the metal. Metal point has been used by artists from the 15th century to the present day. 
== Synonyms and Related Terms ==
metalpoint; silver point; lead point; gold point
== Additional Images ==
File:metalpoint.jpg|Metalpoint
File:Metalpoint_alldrawnout_comp.jpg|Metal point
File:15thCent.Silver_drawnout.jpg|15th century style silver point
File:lead_drawnout.jpg|Lead point
File:Lead_Tin_drawnout.jpg|Lead-tin alloy metal point
File:Silverpoint_drawnout.jpg|Silver point
File:Tin_drawnout.jpg|Tin point
File:metalpoint3 100X.jpg|Metalpoint at 100x
File:AndreasAvester Metalpoint colors.jpg|thumb|Colors of a variety of metalpointsAndreas Avester at Metal point drawings
File:AndreasAvester Metalpoint corrosion.jpg| Tarnished colors for a variety of metalpointsAndreas Avester at Metal point drawings
==Resources and Citations==
* Andreas Avestar: Metalpoint drawings
* Thea Burns, The Luminous Trace: Drawing and Writing in Metalpoint. London: Archetype Publications, 2012.
* Italian Renaissance Drawings: Technical Examination and Analysis. Janet Ambers, Catherine Higgitt and David Saunders (ed.), The British Museum, 2010.
* Media & Techniques of Works of Art on Paper, New York University, New York, 1999
* The Bullfinch Guide to Art History, Shearer West (ed.), Bullfinch Press, Boston, 1996
* James Watrous, The Craft of Old-Master Drawings, University of Wisconsin Press, 1957.
Category:Materials database
Metaldehyde

== Description ==
White prisms crystals used as an insecticide, especially in gardens for snails and slugs. In interior spaces, metaldehyde has been used to control cockroaches, ants, and termites. Pellets are used as a solid fuel in ethanol burners.
== Synonyms and Related Terms ==
metacetaldehyde
[[[SliderGallery rightalign|metaldehyde.jpg~Chemical structure]]]
==Risks==
ThermoFisher: SDS
==Physical and Chemical Properties==
Soluble in benzene, chloroform. Slightly soluble in ethanol, ether. Insoluble in water. Sublimes at 112 C.
Composition 	(CH3CHO)n
CAS 	9002-91-9
Melting Point 	246 C
Density 	1.27 g/ml
Molecular Weight	mol. wt. = 176.21
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 5983
* Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002
Category:Materials database
Metallic fiber

== Description ==
A manufactured fiber in which the fiber-forming substance is any metal, plastic coated metal, metal coated plastic or a core completely covered by metal (Federal Trade Commission definition). Metallic fibers from ductile metals, such as gold, silver, and copper, were used in ancient Persia, India and Egypt for weaving and embroidery. Today, metal filaments of gold, silver, stainless steel and aluminum are used for textile decoration. Some commercial types of metallic fibers, called multi-component, have a central metal (often colored aluminum) filament laminated in cellulose acetate butyrate or polyester. Polymer coatings minimize breakage and chemical deterioration, but usually can not withstand high temperature drying or ironing. In general, metallic fibers have are dense, e.g., 7.9 specific gravity for stainless steel compared to 0.9 for polypropylene. Additionally, they can withstand high temperatures and are resistant to most chemicals, abrasion, and soiling. Metal fibers dissipate static electricity and heat. Some fibers are magnetic or reflect microwave radiation. Metallic fibers are used in combination with other fibers in clothing, household furnishings and carpets for decoration and static electricity control. Woven metal fabric is also used as screening.
== Synonyms and Related Terms ==
metallic thread; metal fiber; wire thread; metallic fibre; hilo metálico (Esp.); metaaldraad (Ned);
==Physical and Chemical Properties==
Stainless steel: 
*Tenacity = 1.8 - 3.2 g/denier 
*Elongation = 11% (annealed) 
*Specific gravity = 7.88 
*Melting pt = 1426C. 
Acetate butyrate coated foil: 
*Tenacity = 0.3 g/denier 
*Elongation = 30% 
*Moisture regain 0.1 % 
*Softening pt = 205C. 
Polyester coated foil: 
*Tenacity = 0.79 g/denier 
*Elongation = 140% 
*Moisture regain 0.5 % 
*Softening pt = 232C
== Additional Images ==
File:Metalthreads_Anne.jpg|Metal threads
File:Metal_silk core_50X.jpg|Metal thread
File:Metalthread_flatmtstrip.jpg|Metal thread
File:Metalleaf_papersupport_50X2.jpg|Metal thread
==Resources and Citations==
* M. Joseph, Introductory Textile Science, Holt Reinhold & Winston, Fort Worth, 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
* Rosalie Rosso King, Textile Identification, Conservation, and Preservation, Noyes Publications, Park Ridge, NJ, 1985
* J.Gordon Cook, Handbook of Textile Fibres:II Man-made Fibres, Merrow Publishing Co. , Durham, England
* Wikipedia: http://en.wikipedia.org/wiki/Metallic_fiber (Accessed Nov. 9, 2005)
* Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
Category:Materials database
Metallic ink

== Description ==
A printing ink that uses a metallic pigment to produce to give the effect of metallized lettering. One reference recommends the use of coated paper with preprinted sizing for better adhesion (Roberts and Etherington 1982).
== Synonyms and Related Terms ==
metal ink; encre métallique (Fr.); tinta metálica (Port.)
==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
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
Category:Materials database
Metallic mortar

== Description ==
A dense, cement that has been filled with metals. Metallic mortars are often made of ceramic oxides filled with lead powder. Metallic mortars are used in the construction of shielding walls for x-rays rooms and nuclear radiation containment areas.
== Synonyms and Related Terms ==
shielding cement
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 442
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
Category:Materials database
Metallic paint

== Description ==
A paint that contains small pieces of metal as a pigment. Metallic paint produces a metallic sheen on the final coated surface and is often used to imitate gilt or silvered surfaces. 
See also metallic pigment, bronze liquid, Dutch metal.
== Synonyms and Related Terms ==
metal flake paint; peinture métallique (Fr.);
==Resources and Citations==
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Metallic paper

== Description ==
1) A paper coated with a thin layer of metal. One method for producing the shiny metallic surface is by adhering aluminum powder or bronze powder with lacquer. Alternatively, a metal layer (e.g., zinc, aluminum, bronze) can be vacuum deposited on the paper. Metallic paper has a much thinner coating of metal than foil paper; it also has more flexibility and resilience. 
2) A coated paper that records nonerasable markings made by a metallic stylus (silver, aluminum, or lead). The white coated surface may contain zinc white or clay mixed with barium sulfate.
== Synonyms and Related Terms ==
metal paper; foil paper; papier métallisé (Fr.)
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 578
* Boise Cascade Paper Group, The Paper Handbook, Boise Cascade, Portland OR, 1989
* The Dictionary of Paper, American Paper Institute, New York, Fourth Edition, 1980
* Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Metallic pigment

== Description ==
Any fine metal powder added to paint for coloring, increased reflectivity, or increased conductivity. Bronze and aluminum powder are used most frequently. 
See also Dutch metal.
== Synonyms and Related Terms ==
metallic color; metal pigment; pigment métallique (Fr.); pigmento metálico (Port.); aluminum powder
== Additional Images ==
File:02 Irid.Pearl_fine 200x Refl.jpg|Iridescent Pearl (fine) at 200x reflected light
File:03 Inter. Gold fine 200x Refl.jpg|Interference Gold (fine) at 200x reflected light
File:04 Inter Copper light fine3 200x.jpg|Iridescent Copper light (fine) at 200x reflected light
File:05 Irid Gold fine2 200x Refl_2.jpg|Iridescent Gold (fine) at 200x reflected light
== Resources and Citations ==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 612
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Metallized dye

== Description ==
The metallic salt of an organic dye. Metallized dyes are applied to fabrics in an acid bath. Sodium chloride is used to precipitate the dye onto the fiber.
== Synonyms and Related Terms ==
tinta metalizada (Port.)
== 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
Category:Materials database
Metallograph

== Description ==
A reflected light microscope used to observe the microstructure of metals and alloys. Many metallographs have an inverted stage in which the polished surface of the sample is placed face down on the states and the objective is underneath the specimen. Thus the sample has less size restrictions that with a normal upright microscope. Zeiss also uses the term, metallograph, to refer to research camera microscopes.
== Synonyms and Related Terms ==
Metallmikroskop (Deut.); metallographisches Mikroskop (Deut.); microscope métallographique (Fr.);
Category:Materials database
Metamerism

== Description ==
The ability of a two materials to appear identical in one type of light, such as daylight, but different under other lighting conditions, such as incandescent. Metamerism is usually considered undesirable, because it makes it difficult to accurately match colors. Color metamerism can be caused by a materials pigment or dye composition as well as by its surface texture and reflectivity.
== Synonyms and Related Terms ==
Metamerie (Deut.); métamérisme (Fr.)
==Physical and Chemical Properties==
The absorption spectra are different for two metameric compounds.
==Resources and Citations==
* S.Staniforth, "Retouching and Colour Matching: The Restorer and Metamerism" Studies in Conservation, 30:101-11, 1985.
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* Hoechst Celanese Corporation, Dictionary of Fiber & Textile Technology (older version called Man-made Fiber and Textile Dictionary, 1965), Hoechst Celanese Corporation, Charlotte NC, 1990
* Wikipedia: http://en.wikipedia.org/wiki/Metamerism_%28color%29 (Accessed Feb. 25, 2006)
Category:Materials database
Metamorphic

== Description ==
A type of rock that has undergone an irreversible change in structure and texture due to the geologic application of heat and or pressure. Marble is a metamorphic form of limestone. Other types of metamorphic rocks include slate, gneiss, and quartzite.
== Synonyms and Related Terms ==
metamorphic rock; Metamorphe Gesteine (Deut.); roca metamófica (Esp.); roche métamorphique (Fr.); metamorf gesteente (Ned.); rocha metamórfica (Port.); metamorficzne (Pol.); metamorf bergart (Sven.)
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
* Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* Wikipedia: http://en.wikipedia.org/wiki/Metamorphic_rock (Accessed Mar. 1, 2006)
Category:Materials database
Metamorphism

== Description ==
Process by which consolidated rocks are altered in their nature adjusting the mineralogical composition, structure, and texture to the different physico-chemical conditions existing in the earth. Diagenesis is usually not considered as metamorphism.
== Synonyms and Related Terms ==
métamorphisme (Fr.); metamorfismo (Port.)
==Resources and Citations==
* José Delgado Rodrigues, LNEC,Submitted information, 2009.
Category:Materials database
Metanil yellow

== Description ==
A orangish-yellow synthetic monoazo dye discovered independently by C.Rumpff in 1879 and Hepp in 1882. Metanil yellow is used to dye leather, wool, silk, nylon, and paper.
== Synonyms and Related Terms ==
CI 13065; Acid Yellow 36; CAS 587-98-4
==Resources and Citations==
* Colour Index International online at www.colour-index.org
Category:Materials database
Metasol

== Description ==
[Lansess, formerly by ECC International] A trademark for a series of fungicides and antimicrobial agents. Metasol solutions originally contained mercury products, but formulations were changed in the late 20th century. The products are used for slime control in pulp and paper processing plants.
* Metasol PAA - peracetic acid, a chlorine-free oxidizer that decomposes to water and acetic acid.
* Metasol LT - low toxicity
* Metasol TK 100 - small grain powder with thiabendazole as the active ingredient. Thermally stable, no yellowing.
* Metasol TK 25 AD - an aqueous dispersion of thiabendazole (25%) that shows broad spectrum activity. Thermally stable, no yellowing.
==Resources and Citations==
* Lanxess: Metasol TK-100
* Special Chem: Metalsol TK-25
* US EPA: Metasol product label
* Pulp and Paper Online: Website
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
Category:Materials database
Meteoric iron

== Description ==
Metallic iron, often alloyed with nickel (2-50%), composes approximately one-sixth of the meteorites that hit the earth's surface. They also contain small amounts of cobalt, arsenic, and manganese. Meteoric iron has been used since before 3000 BCE for tools and weapons.
== Synonyms and Related Terms ==
taenite; iron meteorite; Meteoreisen (Deut.); meteoritisch ijzer (Ned.)
==Resources and Citations==
* David C. Scott, Metallography and Microstructure of Ancient and Historic Metals, The Getty Conservation Institute, Los Angeles, 1991
* R.F.Symmes, T.T.Harding, Paul Taylor, Rocks, Fossils and Gems, DK Publishing, Inc., New York City, 1997
* Dr. Robert Ogilvie, Massachusetts Institute of Technology, Submitted information, August 2004.
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* A.Lucas, J.R.Harris, Ancient Egyptian Materials and Industries, Edward Arnold Publishers Ltd., London, 4th edition, 1962
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 543
Category:Materials database
Meteorite

== Description ==
A mineral mass that falls to the earth from outer space. There are three main categories of meteorites: 1) stony (aerolites), which account for approximately 61% of all meteorites , 2) stony irons (siderolites) account for 20%, and 3) metallic or iron meteorites (siderite) make up about 15%. The stony meteorites are composed of silicates. Stony meteorites containing small spherical inclusions are called chondrites. Tekites (australite) are small, round, glassy stones that are thought to come from meteor impact with the earth. The stony irons are a combination of silicate stone cemented with metallic iron. Iron meteorites contain iron alloyed with about 2-50% nickel. They also contain small amounts of cobalt, arsenic, and manganese. Meteoric iron has been used since ancient times for tools and weapons.
== Synonyms and Related Terms ==
meteorites; chondrite; tekite; aerolite; siderolite; siderite; australite; météorite (Fr.); meteorito (Esp., Port); Meteorit (Deut.); meteoriet (Ned.)
== Resources and Citations ==
* R.F.Symmes, T.T.Harding, Paul Taylor, Rocks, Fossils and Gems, DK Publishing, Inc., New York City, 1997
* Encyclopedia Britannica, http://www.britannica.com Comment: "tektite" [Accessed October 11, 2002].
* 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
* Submission by Dr. Robert Ogilvie, Massachusetts Institute of Technology, August 2004.
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Metepa

== Description ==
An amber liquid used to crease-proof and flameproof textiles. Metepa also works as a chemo-sterilant for many insects. A process for making metepa was patented to American Cyanamid in 1952. It has also been used as a rocket propellant.
== Synonyms and Related Terms ==
tris(methyl-1-aziridinyl)phosphine oxide; methyl aphoxide; methapoxide; MAPO
== Risks ==
* Toxic by ingestion and skin absorption. 
* Irritating to the skin.
* Possible carcinogen and teratogen
* NIH: Technical and Safety information
==Physical and Chemical Properties==
Composition 	(C3H6N)3PO
CAS 	57-39-6
Melting Point 	90-92 C
Molecular Weight	mol. wt. = 215.24
==Resources and Citations==
* Wikipedia: Metepa Accessed August 2022
Category:Materials database
Methacrylate resin

== Description ==
A plastic derived from methacrylic acid. Methacrylate resins are more commonly called acrylic resins.
== Synonyms and Related Terms ==
resina de metacrilato (Esp.); résine méthacrylique (Fr.); resina metarilica (It.); resina metacrílica (Port.)
==Resources and Citations==
* 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
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Methacrylic acid

== Description ==
A clear, colorless liquid that readily polymerizes to form acrylic resins.
[[[SliderGallery rightalign|methacrylic acid.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
alpha-methacrylic acid; 2-methylpropenoic acid; ácido metácrílico (Esp.); acido metacrilico (It.); ácido metacrílico (Port.)
== Risks ==
* Strongly irritating to skin, lungs, and membranes. 
* Combustible. Flash point = 77 C 
* ThermoFisher: SDS
==Physical and Chemical Properties==
Soluble in water, ethanol, ether and most organic solvents.
Composition 	H2C:C(CH3)COOH
CAS 	79-41-4
Melting Point 	16 C
Density 	1.0153 g/ml
Molecular Weight	mol. wt. = 86.09
Boiling Point 	163 C
==Resources and Citations==
* The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 6005
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 10
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
Category:Materials database
Methane

== Description ==
A colorless, odorless gas that is the first member of the alkane hydrocarbon series. Methane occurs in natural gas (~85%), as firedamp in coal mines and as the byproduct of petroleum refining. Methane is also formed from decaying vegetation and other organic matter in swamps and marshes. Methane forms an explosive mixture with air. Methane is used commercially as a fuel, in the production of carbon black and as a starting material for the manufacture of many chemicals.
== Synonyms and Related Terms ==
marsh gas; methyl hydride; swamp gas; natural gas; fire damp
== Risks ==
* Combustible. Severe fire and explosion risk. 
* Nonpoisonous. 
* Contact with liquid may cause frostbite.
* Air Liquide: SDS
==Physical and Chemical Properties==
* Soluble in ethanol, ether and other organic solvents. 
* Unaffected by sulfuric acid, nitric acid and alkalis. 
* Explosively reacts with chlorine and bromine.
Composition 	CH4
CAS 	74-82-8
Melting Point 	-182.6 C
Molecular Weight	mol. wt. = 16.0
Boiling Point 	-161.4 C
 
Category:Materials database