nyuuzyou/wikis huggingface dataset:
Purple of Cassius

== Description ==
A permanent red-violet pigment. Purple of Cassius was first made by Andreas Cassius in Germany in 1676. It is composed of fine particle gold precipitated on hydrated stannic oxide when tin chlorides are mixed into a dilute gold chloride solution. The addition of potassium carbonate to the solution deepens the purple color. Purple of Cassius was used until the mid 19th century when it was replaced by cobalt violet. The expensive pigment was used in miniature paintings and to make ruby glass and ceramic glazes. When tin is present as a red-violet painting pigment, there is also the possibility of cochineal prepared on a tin substrate.
== Synonyms and Related Terms ==
purple-of-Cassius; gold-tin purple; gold purple
== Physical and Chemical Properties ==
* Soluble in ammonia. Insoluble in water.
* Resistant to high temperatures.
Category:Materials database
Purpleheart

== Description ==
A purplish hardwood obtained from species in the genus Peltogyne that are native to tropical regions of Central and South America. Purpleheart or amaranth, wood has a fine, uniform texture and grain that is straight or slightly roey. The durable, shock-resistant wood is sometimes used for carving and for vehicle construction.
== Synonyms and Related Terms ==
Peltogyne; amaranth (wood); violet wood; amarante (Fr.); amaranto (Esp.) ; pau roxo (Port.)
== Physical and Chemical Properties ==
* Tree grows to heights of 50 m and diameter of 1 m. 
* Specific gravity = 0.8-1.0 (air dry)
* Density = 60-65 ppcf
* Heartwood is dull purplish brown when cut but with exposure to air turns a deep eggplant purple; with further aging it becomes dark brown
* Grain is usually straight and texture is medium with a good natural luster
* Wood is very resistant to decay and insect attack
== Additional Images ==
File:Purple heart Bog Oak and Boxwood Box.jpg|
File:Purpleheart_amaranth.jpg|Purpleheart (Amaranth) (Peltogyne paniculata)
==Working Properties==
* If wood is heated with dull tools, or if cutter speeds are too high, purpleheart will exude a gummy resin that can clog tools and complicate the machining process
* Depending on the grain orientation, it can be difficult to plane without tearout. 
==Resources and Citations==
* The Wood Database: Purpleheart
* Gordon Hanlon, contributed information, 1998
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* F. H. Titmuss, Commercial Timbers of the World, The Technical Press Ltd., London, 1965
Category:Materials database
Purpurin

== Description ==
One of the natural colorants extracted from madder roots and other Rubiaceae family plants. Purpurin has been manufactured synthetically by the oxidation of alizarin since the 1920s. Purpurin forms a brilliant red color when mordanted with aluminum salts. It is not considered a permanent artists pigment (Mayer 1969). In red dyed fabric, the presence of purpurin along with alizarin has been used to distinguish natural madder dyes from the synthetic alizarin dyes first sold in 1871. Purpurin fluoresces a bright yellow-red while alizarin produces a pale violet color.
== Synonyms and Related Terms ==
1,2,4-trihydroxyanthraquinone; Natural Red 16; CI 75410; purpurine; purpuriini (Fin.); purpurina (Esp., Port.)
[[[SliderGallery rightalign|Purpurin.TIF~FTIR (MFA)|PurpurinUCL.jpg~Raman (UCL)|Purpurin color.PNG~EEM Color|Purpurin line.PNG~EEM Line]]]
== Physical and Chemical Properties ==
* Soluble in alkali, benzene, ether, glacial acetic acid. 
* Slightly soluble in hot water, ethanol. 
* Fluoresces a bright yellow-red color. 
* Bright red, needle crystals. Turns yellow in alkaline solutions.
* Melting Point = 263
== Resources and Citations ==
* H.Schweppe, J.Winter, "Madder and Alizarin", Artists Pigments, Volume 3, E. West FitzHugh (ed.), Oxford University Press: Oxford, 1997. ° R. Mayer, A Dictionary of Art Terms and Techniques, Harper and Row, New York, 1969.
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 475
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* Website address 1 Comment: http://www.coloria.net/varita.htm - Finnish names
* Thomas B. Brill, Light Its Interaction with Art and Antiquities, Plenum Press, New York City, 1980
* Artists' Pigments: A Handbook of their History and Characteristics, Elisabeth West FitzHugh, Oxford University Press, Oxford, Vol. 3, 1997 Comment: H.Schweppe, J.Winter, "Madder and Alizarin"
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Purpurite

== Description ==
[[[SliderGallery rightalign|purpurite632.jpg~Raman]]]
A purple pigment composed of iron-manganese phosphate.
==Physical and Chemical Properties==
Composition	MnPO4
==Resources and Citations==
* Kremer Pigmente at www.kremer-pigmente.de/edaten/krpigm01.htm
* Wikipedia: http://en.wikipedia.org/wiki/Purpurite (Accessed Sept. 14, 2005)
Category:Materials database
Putty

== Description ==
A thick, paste-like mixture of linseed oil (about 15%) with powdered calcium carbonate (about 85%). Putty was used to secure a window pane to the frame and while forming an air and water tight seal. It was also used to fill defects in wood and metal. Some putties also contained lead white or red lead and were called white lead putty and red lead putty. The lead pigments accelerated the drying of the linseed oil. Colorless putty was made by mixing alumina trihydrate with oil or resin varnishes. Caulking putty is a putty mixture that may contain asbestos fiber as a filler. In the second half of the 20th century, many new types of sealants and glazing compounds became available using synthetic polymers resulting in the abandonment of the oil based putties. See also glazing compound, and sealant.
== Synonyms and Related Terms ==
window putty; glazing putty; picture putty; red lead putty; white lead putty; glazing compound; caulking; caulk; fill; Kitt (Deut.); Glaserkitt (Deut.); Fensterkitt (Deut.); kalfatring (Dan.); kit (Pol.); mastic (Fr.);
== Physical and Chemical Properties ==
For removing old glazing, chemical methods use methylene chloride based paint strippers to soften the putty. Mechanical removal methods use directed heat (spatulas or air-guns) but contact of the heat with glass may cause cracking.
== Resources and Citations ==
* J.Thornton, "A Brief History and Review of the Early Practice and Materials of Gap-Filling in the West" JAIC 37: 3-22, 1998
* M. Doerner, The Materials of the Artist, Harcourt, Brace & Co., 1934
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 642
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* ASTM, "Standard Terminology Relating to Paint, Varnish, Lacquer and Related Products", Annual Book of ASTM Standards, Section 6, Paints, Related Coatings and Aromatics, ASTM, D16, 7-Jan, Jul-96
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Frank A. Lent, Trade names and Descriptions of Marbles, Limestones, Sandstones, Granites and Other Building Stones Quarried in the United States Canada and other Countries., Stone Publishing Co, New York, 1925
Category:Materials database
Putty powder

== Description ==
An abrasive made from tin oxide. Putty powder was used for polishing glass and marble.
== Synonyms and Related Terms ==
putty; jewelers putty
== Comparisons ==
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 642
* 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
* Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
* R.M.Organ, Design for Scientific Conservation of Antiquities, Smithsonian Institution, Washington DC, 1968
* George Savage, Art and Antique Restorer's Handbook, Rockliff Publishing Corp, London, 1954
Category:Materials database
Pyragyrite

== Description ==
The blackish red mineral composed of the double sulfide of silver and antimony. Pyragyrite is often associated with silver deposits. It has been found in Peru, Russia, Australia, Canada, Mexico, and the United States (Colorado, Nevada, Idaho). Pyragyrite was also called red silver, ruby silver ore, and dark red silver ore prior to the 1800s.
== Synonyms and Related Terms ==
silver antimony sulfide; red silver; ruby silver ore; dark red silver ore
== Physical and Chemical Properties ==
* Hexagonal crystal system with good cleavage in one direction. 
* Striated. 
* Fracture = conchoidal or uneven. 
* Luster = adamantine. 
* Streak = purplish red
Composition 	Ag3SbS3
Mohs Hardness	2.5
Density 	5.8-5.9 g/ml
==Resources and Citations==
* Mineralogy Database: Pyrargyrite
* C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
* 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
Pyrazolone

== Description ==
A bright orange azo colorant. Pyrazolone is extensively used in rubbers, but has had limited use in polyolefins and is not used in plasticized plastics because of its tendency to migrate and bleed. It is colorfast to water and detergents. Pyrazolone has been used in some air-drying paints and printing inks.
== Synonyms and Related Terms ==
Pigment Orange 13; CI 21110; disazopyrazolone; pyrazolone orange
[[[SliderGallery rightalign|PO013 Sun Pyrazolone or diarilide orange.PNG~FTIR (MFA)]]]
== Other Properties ==
Recommended for products processed below 200 C. 
Lightfast = 4-6 (Blue scale)
CAS	3520-72-7
== Hazards and Safety ==
May migrate, bleed, nad bloom.
== Additional Information ==
º W. Herbst, K. Hunger, Industrial Organic Pigments, Wiley-VCH Verlag GmbH & Co., Weinheim, p. 266.
== Sources Checked for Data in Record ==
* B. Berrie, S.Q. Lomax, 'Azo Pigments: Their History, Synthesis, Properties and Use in Artists' Materials', Studies in the History of Art , National Gallery of Art, Washington DC, No. 57, 1997
Category:Materials database
Pyrethrin

== Description ==
A natural knockdown type insecticide derived from chrysanthemum flowers. Pyrethrin does not usually kill the insects so they must be disposed of while they are unconscious. It is often used in combination with other insecticides.
Note: The synthetically produced pyrethrin mixture is called permethrin.
== Synonyms and Related Terms ==
pyrethrins; pyrethrum; pyrenone; pyrocide
== Risks ==
* Toxic by ingestion, inhalation and skin contact. LD50 = 584-900 mg/kg. 
* Persons sensitive to ragweed will be prone to pyrethrin poisoning.
== Physical and Chemical Properties ==
Insoluble in water. Soluble in alcohol, petroleum ether, kerosene, carbon tetrachloride, ethylene dichloride, nitromethane.
Composition 	C21H28O3
CAS 	8003-34-7
Refractive Index	1.5242
==Resources and Citations==
* Wikipedia: Permethrin Accessed July 2023
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 643
* Lynda A. Zycherman, J.Richard Schrock, A Guide to Museum Pest Control, FAIC and Association of Systematics Collections, Washington DC, 1988
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
* Encyclopedia Britannica, http://www.britannica.com Comment: "pyrethrum" [Accessed March 26, 2002].
* J. Dawson, CCI Technical Bulletin, 'Solving Museum Insect Problems: Chemical Control' , Canadian Conservation Institute, Ottawa, No. 15
* Stephen R. Edwards, Bruce M. Bell, Mary Elizabeth King, Pest Control in Museums: a Status Report 1980, Association of Systematics Collections, Washington DC, 1980
* 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
Pyrethrum

== Description ==
A natural mixture of six pyrethrin compounds obtained from chrysanthemum flowers that has been used for centuries as an insecticide. For use as an insecticide, the flowers were dried then mixed with water. They were also used as companion plants to minimize garden pests such as aphids, leafhoppers, tick and rabbits.
See pyrethrin.
==Risks==
* Highly toxic to cats
==Resources and Citations==
* Wikipedia: Pyrethrum Accessed July 2023
Category:Materials database
Pyrex

== Description ==
[Corning] A registered trademark for a borosilicate glass introduced in 1915. Pyrex glass is resistant to heat and chemicals. It also has higher mechanical strength than soda-lime glass.
== Synonyms and Related Terms ==
vidrio pyrex (Esp.); vidro pyrex (Port.); Duran
==Physical and Chemical Properties==
Melting Point 	820 C (softens)
Density 	2.23 g/ml
Refractive Index	1.474
==Resources and Citations==
* Corning Glass: Product information
Category:Materials database
Pyridine

== Description ==
A yellow liquid with a noxious odor. Pyridine was first prepared from coal-tar in 1846 by Anderson. Pyridine is used as a solvent and it is one of the few solvents that can dissolve dried linseed oil in paints and varnishes. It is used as a denaturant for ethanol to make it unfit for drinking. Pyridine has also been used as a chemical raw material for manufacturing many compounds and as a water repellent, bactericide, and herbicide.
[[[SliderGallery rightalign|pyridine.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
azabenzene; azine
== Risks ==
* Flammable. Flash point = 68F. 
* Dangerous fire risk. Combustion produces highly toxic cyanide gases. 
* Toxic by ingestion and inhalation. 
* May be absorbed through the skin causing irritation. 
* ThermoFisher: SDS
* EPA lists pyridine as hazardous waste due to its toxicity and ignitability; concentrations over 10% must be disposed of appropriately
== Physical and Chemical Properties ==
Soluble in water, ethanol, ether, benzene, ligroin and fatty oils.
Composition 	N(CH)4CH
CAS 	110-86-1
Melting Point 	-42.0 C
Density 	0.987 g/ml
Molecular Weight	mol. wt.=79.11
Refractive Index	1.5092
Boiling Point 	115.5 C
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p.817
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* George Savage, Art and Antique Restorer's Handbook, Rockliff Publishing Corp, London, 1954
* The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 7869; ref. index=1.5092
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.507
Category:Materials database
Pyrite

== Description ==
General name for any metal sulfide mineral. The name pyrite is also commonly used for one mineral form of iron disulfide. Other types of pyrite include the sulfide salts of arsenic (mispickel), copper (chalcopyrite), cobalt (smaltite) and tin. Ethanolamine thioglycollate treatments have been used to minimize the decomposition of pyritic specimens (Cornish 1984). 
See also pyrrhotite.
[[[SliderGallery rightalign|pyriteRS.jpg~Raman (RASMIN)|Pyriteitaly2.jpg~Raman (U of Parma)|Pyrite Raman RRUFF R050190.png~Raman (RRUFF)]]]
== Synonyms and Related Terms ==
Fool's gold; iron disulfide; mundic; andodamus (Pliny); Pyrit (Deut.); pirita (Esp.); pyrite (Fr.); pyriet (Ned.); piryt (Pol.); pirite (Port.)
== Risks ==
* Can evolve low levels of sulfur dioxide. 
* Degrades in high humidity environments.
== Physical and Chemical Properties ==
* Insoluble in water 
* Magnetic after heating (iron pyrite) 
* Crystal system = cubic 
* Cleavage = poor 
* Fracture = uneven 
* Luster = metallic 
* Streak = greenish black to brown
Composition 	FeS2
Mohs Hardness	6.0 - 6.5
Density 	4.9-5.1 g/ml
==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.
* 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
* Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
* Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002
* Wikipedia: Pyrite (Accessed Sept. 14, 2005 and Dec 2022)
* WebMinerals: Pyrite
Category:Materials database
Pyrocatechol

== Description ==
Colorless crystals that turn brown with exposure to air. Pyrocatechol can be synthesized from coal tar and occurs naturally in some plant materials. Pyrocatechol is used in inks, photography, dyes, leather tanning and as a light stabilizer and antioxidant.
[[[SliderGallery rightalign|pyrocatechol.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
catechol; o-dihydroxybenzene; 1,2-benzenediol; dihydric phenol; pyrocatechin; 1,2-phendiol; Kachin
== Risks ==
* Toxic by ingestion, inhalation and skin absorption. 
* Skin contact causes irritation. 
* Combustible. Flash point = 127 C. 
* MilliporeSigma: SDS
== Physical and Chemical Properties ==
Soluble in water, ethanol, ether, benzene. Dissolves and turns black in alkaline solutions.
Composition 	C6H4(OH)2
CAS 	120-80-9
Melting Point 	104 C
Density 	1.371 g/ml
Molecular Weight	mol. wt.=110.1
Boiling Point 	245 C
==Resources and Citations==
* Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
Category:Materials database
Pyrogallic acid

== Description ==
Tiny, white, light-sensitive crystals that tend to float with air movement. Pyrogallic acid, or pyro, is used as a developer in photographic solutions. It reduces the salts of gold, silver, mercury, and platinum to their metallic state. This characteristic was first noted in 1832 and soon after it was applied to photograph development. Pyrogallic acid is also used in the manufacture of dyes.
[[[SliderGallery rightalign|pyrogallic acid.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
pyrogallol; pyro; 1,2,3-trihydroxybenzene; 1,2,3-benzenetriol; Fouramine brown AP; Fourrin; CI 76515; Oxidation base 32; Piral
== Risks ==
* Toxic by ingestion, inhalation and skin absorption. 
* Skin contact can cause irritation and allergies. 
* Combustible. 
* Fisher Scientific: SDS
== Physical and Chemical Properties ==
Soluble in water, ethanol, ether. Needle-shaped crystals.
Composition 	C6H3(OH)3
CAS 	87-66-1
Melting Point 	131-134 C
Density 	1.45g/ml
Molecular Weight	mol. wt.=126.1
Boiling Point 	309 C
== 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
* Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 796
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
Category:Materials database
Pyrogallol tannin

== Description ==
One of two general classes of vegetable tannins. The other class is catechol. Pyrogallol tannins contain pyrogallic acid. Examples include chestnut, oak bark, myrobalan extract, and divi-divi.
== Resources and Citations ==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 797
Category:Materials database
Pyrogel

==Description== 
[Aspen Aerogels] A flexible high-temperature insulation blanket formed of silica aerogel that is reinforced with a non-woven, glass-fiber batting. Pyrogel blankets provide exceptional passive fire protection and superior thermal performance in an easy to install, lightweight format. In addition to maintaining a constant temperature, the Pyrogel blankets are hydrophobic and breathable, thus allowing any covered material to maintain a constant environment even in moist, hot, or cold conditions.
* Pyrogel XTE: best for thermal and acoustical insulation and corrosion inhibition; of used for pipes (Datasheet)
* Pyrogel XTF: best for passive fire protection and acoustics (Datasheet) 
* Pyrogel HPS: best for high temperature service (Datasheet)
* Pyrogel XTZ: available with factory-applied foil vapor barrier that is best for low- to moderate-temperature applications such as chilled water piping.
==Applications== 
* Fire prevention
* Thermal insulation
==Risks==
* Use PPE when handling, cutting and installing
==Physical and Chemical Properties==
* Can withstand temperatures up to 650 C (1200 F)
* Very lightweight
* Density = 0.2 g/ml
* Thicknesses = 5mmm (XTE), or 10mm (XTE, XTF, HPS)
==Working Properties==
* * Conventional cutting tools may be used (scissors, knives, etc.)
 
==Resources and Citations==
* Aspen Aerogels: Passive fire protection
* Distribution International: Pyrogel
Thermaxx Jackets: [https://www.thermaxxjackets.com/products/insulation-materials/pyroge Pyrogel
* Praestegaard L., G. Sorig Thomsen, K. Woer 'Before the Fire: Experiments on Fire-Protecting Cover Materials', Studies in Conservation, 68(1), 1-8, (2023) link
* Skanacid A/S: www.skanacid.dk
* Aerogel: What is Aeogel?
* Wikipedia: https://en.wikipedia.org/wiki/Aerogel
Category:Materials database
Pyrolusite

== Description ==
A manganese dioxide ore that is used as a decolorizer in the manufacture of glass. The lustrous, metallic black ore is mined in various regions of Germany, Brazil, Cuba, Morocco, Ghana, South Africa, India and the U.S.(Georgia, Minnnesota). Pyrolusite is used in the manufacture of ferromanganese, steel and manganese bronze.
== Synonyms and Related Terms ==
glassmaker's soap; pirolusita (Esp.); pirolusite (Port.); Pyrolusit (Deut.); pyrolusiet (Ned.)
== Physical and Chemical Properties ==
* Tetragonal crystal system, usually found as massive columns. 
* Cleavage is perfect in one direction. 
* Fracture is splintery; brittle. 
* Luster = metallic to dull. 
* Streak = black to bluish black.
Mohs Hardness	2.0 - 2.5
Density 	4.75 g/ml
==Resources and Citations==
* Mineralogy Database: Pyrolusite
Category:Materials database
Pyrometer

== Description ==
A heat measuring device used at high temperatures, such as found in a furnace, kiln, molten metal, hot springs or volcanos. Pyrometers are used to measure temperatures from 700 C to about 1800 C. Most pyrometers fall into three categories:
* Electrical pyrometer: The electrical resistance of a thermocouple, a unit with wires of two dissimilar metals, is converted to a temperature value.
* Optical pyrometer: A material, called a hot body, that emits light when heated is placed inside the the heat source. The color of the glowing hot body, from dull red to white hot, is measured and converted to a temperature value.
* Radiation pyrometer: Also uses a hot body to emit light. A photo-electric light meter measures the emission and the value is converted to temperature.
Category:Materials database