nyuuzyou/wikis huggingface dataset:
Nitrobenzene

== Description ==
A pale yellow, viscous liquid formed by the reaction of fuming nitric acid on benzene. Nitrobenzene was discovered by Mitscherlich in 1834. When cooled, it forms bright yellow crystals. Nitrobenzene is very toxic. It is used in the manufacture of aniline dyes. as well as being an ingredient in soaps, polishes (metal and shoe), and lubricating oils.
[[[SliderGallery rightalign|nitrobenzene.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
oil of mirbane; myrbane; nitrobenzol; essence of mirbane
== Risks ==
* Toxic by inhalation, ingestion and skin contact. 
* Combustible. Flash point = 88 C (190 F) 
* ThermoFisher: SDS
* EPA lists nitrobenzene as hazardous waste due to its toxicity; concentrations over 10% must be disposed of appropriately
== Physical and Chemical Properties ==
Soluble in ethanol, benzene, ether, and oils. Slightly soluble in water.
Composition 	C6H5NO2
CAS 	98-95-3
Melting Point 	5.7 C
Density 	1.19867 g/ml
Molecular Weight	mol. wt.=123.11
Refractive Index	1.550
Boiling Point 	210-211 C
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* 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
* 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 6685
* F. Crace-Calvert, Dyeing and Calico Printing, Palmer & Howe, London, 1876 Comment: p. 355
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.550
Category:Materials database
Nitrogen

== Description ==
A colorless, odorless, inert gas that composes 75.5% (by weight) of the atmosphere on earth and is an essential element in all living organisms. Nitrogen was first identified as an element in 1772 by Daniel Rutherford, Scotland. It serves as a diluent in the atmosphere and, as such, controls the rates of combustion and respiration. Nitrogen is used in the manufacture of Ammonia, nitric acid, nitrates, and cyanides. It is also used as an inert, oxygen-free atmosphere for the preservation of materials and the asphyxiation of insects. Liquid nitrogen is used as a coolant for food freezing processes and for many types of instruments.
== Synonyms and Related Terms ==
N; Stikstof (Ned.); azote (Fr.); Stickstoff (Deut.); azoto (It.); Nitrogênio (Port.); nitrógeno (Esp.); Kväve (Sven.)
== Risks ==
* Can displace oxygen and act as an asphyxiant.
* Airgas: SDS
== Physical and Chemical Properties ==
Slightly soluble in ethanol and liquid ammonia. Insoluble in most other liquids.
Composition 	N (atomic no. 7)
CAS 	7727-37-9
Melting Point 	-210.0 C
Molecular Weight	atomic wt = 14.0067
Boiling Point 	-195.79 C
== Resources and Citations ==
* Web Elements: Nitrogen
Category:Materials database
Nitrogen dioxide

== Description ==
A reddish-brown poisonous gas that is a component in photochemical smog. Nitrogen dioxide is a strong nitrating and oxidizing agents that can attack many types of materials. Liquid nitrogen dioxide is used as a rocket propellant. As an air pollutant, nitrogen dioxide is produced by the combustion of fossil fuels. Small amounts may be produced by the decomposition of cellulose nitrate. Nitrogen dioxide can cause fading of dyes and organic colorants in textiles, paints, and photographs. 
See also nitrogen oxides.
== Synonyms and Related Terms ==
dinitrogen tetroxide (as liquid)
== Risks ==
* Toxic in small amounts by inhalation. 
* Irritating to skin, eyes and other membranes. 
* Corrosive to steel in the presence of moisture. 
* Advanced Specialty Gases: SDS
== Physical and Chemical Properties ==
* Soluble in concentrated sulfuric and nitric acids. 
* Decomposes in water forming nitric acid and nitric oxide. 
* Reacts with alkalis to form nitrates and nitrites.
Composition 	NO2
CAS 	10102-44-0
Melting Point 	-9.3 C
Molecular Weight	mol. wt. = 46.01
Boiling Point 	21.15 C
Category:Materials database
Nitrogen oxides

== Description ==
The general term used for any of the nitrogen oxide gases (nitric oxide, nitrous oxide, nitrogen dioxide, and others) that occur as atmospheric pollutants. Nitrogen oxides are produced by the incomplete combustion of petroleum and coal. They are also produced by passing air through an electric arc. Nitrogen oxides are strong nitrating and oxidizing agents that attack many types of materials, such as metals, stones, cellulose, proteins, and dyes. Nitrogen oxides react with volatile organic compounds to form ozone. Over 23,000 tons of nitrogen oxides were emitted as pollutants in the United States in 1994.
* See Pollutant record for a comparison table of aerosols and collection risks.
== Personal Risks ==
* Toxic by inhalation. 
* Irritating to skin, eyes and other membranes.
==Collection Risks==
* Corrodes copper, brass, iron and zinc
* Weakens cellulose and proteins
* Discolors dyes, inks, and pigments
* May fade some color photographs
==Resources and Citations==
* Jean Tétreault, 'Products used in Preventive Conservation' Technical Bulletin #2, CCI, 2017. Link
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 547
* The Dictionary of Paper, American Paper Institute, New York, Fourth Edition, 1980
* Marjorie Shelley, The Care and Handling of Art Objects, The Metropolitan Museum, New York, 1987
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
Category:Materials databaseCategory: MWGCategory: Climate/Environment
Nitroglycerin

== Description ==
A heavy, poisonous, oily compound that is unstable and can readily explode. Nitroglycerin was discovered by Ascanio Sobrero in 1847. A safe manufacturing process was developed by Alfred Nobel in the 1860s. Nitroglycerin is prepared by the nitration of glycerol. It is used to make dynamite. 
== Synonyms and Related Terms ==
nitroglycerine; glyceryl trinitrate; trinitroglycerin; Swedish blasting oil; nitroglycerin (Dan., Sven.); Glycerintrinitrat (Deut.); nitroglicerina (Esp., It., Port.); nitroglycérine (Fr.); trinitrine (Fr.); Nitroglycerine (Ned.); nitrogliceryna (Pol.); triazotan glicerol (Pol.); (Port.)
[[[SliderGallery rightalign|nitroglycerinvt.jpg~Chemical structure]]]
== Risks ==
* Compound can be desensitized by cooling to 5-10 C but then should never be warmed as thawing is extremely hazardous.
* Pfizer: SDS
==Physical and Chemical Properties==
Composition 	C3H5N3O9
CAS 	55-63-0
Melting Point 	13.2 C
Density 	1.13 g/ml
Molecular Weight	227.0872
Boiling Point 	50-60 C (decomposes)
==Resources and Citations==
* Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
* Wikipedia: http://en.wikipedia.org/wiki/Nitroglycerin (Accessed Oct. 18, 2005)
Category:Materials database
Nitroso dye

== Description ==
A group of dyes whose chromophore group is N=O or N=OH. Nitoroso dyes, and similar nitro dyes, were first developed in 1864. Examples are, Martins yellow, Palatine orange and nitroso green (CI Pigment Green 8). Nitroso dyes can form azo complexes with iron.
== Synonyms and Related Terms ==
nitroso dyes; quinone oxime dyes; nitro dyes; colorantes nitrosos (Esp.)
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Monona Rossol, The Artist's Complete Health and Safety Guide, Allworth Press, New York, 1994
* Thomas B. Brill, Light Its Interaction with Art and Antiquities, Plenum Press, New York City, 1980
Category:Materials database
Nitrous acid

== Description ==
A pale blue solution that is a weak acid. Nitrous acid is unstable and decomposes in water to form nitric acid and nitric oxide. It also reacts with single valent cations, such as sodium and potassium, to form water-soluble salts.
==Physical and Chemical Properties==
Composition 	HNO2
CAS 	7782-77-6
Molecular Weight	mol. wt. = 47.01
Category:Materials database
Nitrous oxide

== Description ==
A colorless, sweet-tasting gas. Nitrous oxide was formerly used as a mild anesthetic called laughing gas. Currently it is used as a propellant in aerosol cans and in leak detection sprays.
== Synonyms and Related Terms ==
dinitrogen monoxide; laughing gas; hyponitrous acid anhydride; factitious air;
== Risks ==
* Asphyxiant; narcotic in high concentrations. 
* Liquid may cause frostbite. 
* LookChem: SDS
==Physical and Chemical Properties==
Soluble in ethanol, ether, and oils.
Composition 	N2O
CAS 	10024-97-2
Melting Point 	-90.81 C
Molecular Weight	mol. wt. = 44.0
Boiling Point 	-88.46 C
Category:Materials database
Noble fir

== Description ==
A large fir tree, Abies procera or Abies nobilis, native to the mountains of California, Washington and Oregon. Noble fir produces a light reddish brown timber that is hard and strong with a close-grain texture. It is generally used for wood pulp, plywood, millwork, and flooring.
== Synonyms and Related Terms ==
Abies procera; Abies nobilis; feathercone red fir; bracted red fir; larch tuck-tuck
==Resources and Citations==
* H. A. Alden, A.C. Wiedenhoeft, "Qualified Determination of Provenance of Wood of the Firs (Abies spp. Mill) Using Microscopic Features of Rays: An Aid to Conservators, Curators and Art Historians" AIC Poster, reprinted online at Link
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* 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 American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Noble gas

== Description ==
Any of the six inert gaseous elements of group 0 in the periodic table. Noble gases are helium, neon, argon, krypton, xenon and radon. They have a filled outer p shell in their electronic structure and thus are considered as having a valence number of zero. Originally, it was thought that the noble gases were unreactive or inert. However in recent years scientists have been able to react krypton, xenon and radon with other elements, but only under extreme conditions such as high pressures, high temperatures and strong electrical fields.
== Synonyms and Related Terms ==
inert gas
Category:Materials database
Noble metal

== Description ==
Any of several metals or alloys that resistant to oxidation, corrosion and dissolution by acids. Examples of noble metals are gold, iridium, mercury, osmium, platinum and ruthenium. The term 'noble metal' is also used on a comparative basis to refer to the most corrosion resistant metal. In this case, when two metals are in an electrolytic system, the least noble metal will corrode first.
==Resources and Citations==
* 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
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 634
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
Category:Materials database
Noibara (Japanese rose) - left (214 L)

[[[SliderGallery rightalign|Uemura_07-23-2009_214.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 214
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 3rd shelf
|-	
! scope="row"|Sample location
| left (214 L)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| black
|-	
! scope="row"|Dyestuff (Japanese common name)
| 野いばら : Noibara
|-	
! scope="row"|Dye (English common name)
| Japanese rose
|-	
! scope="row"|Dyestuff (botanical name)
| Rosa multiflora Thunb. var. multiflora
|-	
! scope="row"|Plant part
| root / dried (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| iron
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's notes
| By Mr. Shoichi Gotoh (), the plant for this experiment was collected and the idea was given.
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Noibara (Japanese rose) - left (215 L)

[[[SliderGallery rightalign|Uemura_07-23-2009_215.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 215
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 3rd shelf
|-	
! scope="row"|Sample location
| left (215 L)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| brown
|-	
! scope="row"|Dyestuff (Japanese common name)
| のいばら : Noibara
|-	
! scope="row"|Dye (English common name)
| Japanese rose
|-	
! scope="row"|Dyestuff (botanical name)
| Rosa multiflora Thunb. var. multiflora
|-	
! scope="row"|Plant part
| root / dried (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| lime water
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Noibara (Japanese rose) - right (214 R)

[[[SliderGallery rightalign|Uemura_07-23-2009_214.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 214
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 3rd shelf
|-	
! scope="row"|Sample location
| right (214 R)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| brown
|-	
! scope="row"|Dyestuff (Japanese common name)
| 野いばら : Noibara
|-	
! scope="row"|Dye (English common name)
| Japanese rose
|-	
! scope="row"|Dyestuff (botanical name)
| Rosa multiflora Thunb. var. multiflora
|-	
! scope="row"|Plant part
| root / dried (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| alum
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's notes
| By Mr. Shoichi Gotoh (), the plant for this experiment was collected and the idea was given.
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Noibara (Japanese rose) - right (215 R)

[[[SliderGallery rightalign|Uemura_07-23-2009_215.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 215
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 3rd shelf
|-	
! scope="row"|Sample location
| right (215 R)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| light brown
|-	
! scope="row"|Dyestuff (Japanese common name)
| のいばら : Noibara
|-	
! scope="row"|Dye (English common name)
| Japanese rose
|-	
! scope="row"|Dyestuff (botanical name)
| Rosa multiflora Thunb. var. multiflora
|-	
! scope="row"|Plant part
| root / dried (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| ash water
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Nomex

== Description ==
[DuPont] A registered trademark for a meta-aramid fiber that was originally developed in the 60s for fire/electrical insulation applications. Nomex® fibers are composed of poly(m-phenylene isophthalamide), which is made from m-phenylene diamine and isophthalic acid. The fibers have excellent dielectric, thermal and mechanical properties and are resistant to fire, water, and biological growth. They retain their properties at temperatures up to 370C (700F). Nomex® fibers are available as both woven and nonwoven fabrics. Due to its fire resistance, Nomex® fabrics are used in fire fighters clothing, military flight suits and other applications in the space program. Soft forms of Nomex® are used for as a lining material in packing museum objects. Nomex® can also be laminated then expanded to form the lightweight core in honeycomb structural boards.
== Synonyms and Related Terms ==
aramid; meta-aramid; Nomex Softwrap; Nomex Gentle Wrap
== Applications ==
* Lining cavities cut in foam
* Can be sewn and bonded with hot melt adhesives without melting
== Personal Risks ==
Nomex SDS []
== Collection Risks ==
May be susceptible to snagging on corners.
== Environmental Risks ==
== Physical and Chemical Properties ==
* Resistant to acids, alkalis, bleaches and most solvents. 
* Fiber is super-strong, yet smooth and soft; does not pill or fuzz.
* Permeable to air and moisture. 
* Fiber cross section = dogbone. 
* Fire resistant and self-extinguishing. 
* Degrades in ultraviolet light.
* Melting Point = 350 C (start of initial decomposition; the process is slow)
* Density = 1.38 g/ml
* Tenacity = 5.3 g/denier (dry)
* Elongation = 22%
* Moisture regain = 3.5%
== Working Properties ==
The spunwoven version of Nomex is typically used in museum applications. It has the unique ability to stretch in one direction, preventing bunching and folding of loose material within a cavity (PACCIN). 
== Forms/Sizes ==
Forms include fibers, paper/fabric, felts, and rigid honeycomb boards.
Flexible fabric typically comes rolls with widths of 39”. Thicknesses range from 3 to 30 mils.
== Comparisons ==
== Resources and Citations ==
* DuPont: Nomex Website
* Preparation, Art Handling, Collections Care Information Network (PACCIN)
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* 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
* Gordon Hanlon, contributed information, 1998
* Meredith Montague, contributed information, 1998
* Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
* Website: www.textileworld.com/categories/9905/fibers/html
Category:Materials database Category:MWG Category:PACCINCategory:Sheet, FabricCategory: Interleaving
Nondestructive testing

== Description ==
A general term for examination, control or test methods that do not alter the physical or chemical characteristics of an object and which do not need any sampling. Examples of nondestructive testing methods include: photography (visible light, infrared or ultraviolet fluorescence), infrared reflectography, X-radiography, gamma radiography, neutron radiography, tomography (CAT scan), infrared thermography, holography, ultrasonic testing, hammer sounding, Eddy current…
These methods, often complementary ones, permit to describe the internal structure of an object, detect defects like alterations, fractures, cracks, unbondings, delaminations, corroded areas, or inform about assembly methods, presence of previous restorations.
== Synonyms and related terms ==
NDT, nondestructive analysis; nondestructive examination, NDE, contrôle non destrutif, CND, essai non destructif, END (Fr.); zerstörungsfreie Prüfung, ZfP (Deut.), prova non distruttiva, PnD (It.); non-destructive analysis; analyse nondestructive (Fr.); zerstörungsfreie Analyse (Deut.)
==Resources and Citations==
* D. Bradley, D. Creagh, Physical techniques in the study of art, archaeology and cultural heritage, Elsevier, Amsterdam (2006)
* R. van Grieken, K. Janssens, Cultural heritage conservation and environment impact assessment by non-destructive techniques and microanalysis, Taylor & Francis, London (2004)
* Nondestructive Testing Handbook, Third Edition Set (Ten Volumes), ASNT, Columbus OH
* W. Goedecke, Wörterbuch der Werkstoffprüfung (Dictionary of material testing – German – English – French), VDI-Verlag, Düsseldorf (1992) ISBN 3-18-401159-3
* E.A. Varella, Conservation science for the cultural heritage - Applications of instrumental analysis, Springer (2013)
Category:Materials database
Nondrying oil

== Description ==
Any vegetable or fish oil that does not dry or form a film, even on long exposure to air. Nondrying oils have a high degree of saturation, which is indicated by a low iodine number (80 - 100). Nondrying oils are primarily used in food products (coconut, corn, olive, etc.) but some are used as plasticizers with drying oils and with natural and synthetic resins. Fish oils are sometimes used in industrial paints.
== Synonyms and Related Terms ==
non-drying oil (Br.); aceite no secante (Esp.)
== Other Properties ==
Iodine numbers range from 100 to 80.
==Resources and Citations==
* R. J. Gettens and G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966. 
* J.S. Mills, R.White, The Organic Chemistry of Museum Objects, Butterworth Heinemann, London, 1994.
* 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
* Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000 Comment: nondrying oil (preferred); non-drying oil (Br.)
Category:Materials database
Nonionic detergent

== Description ==
A surfactant that does not dissociate, or form ions, in solution. Nonionic surfactants are made by reacting sucrose with fatty acid ester of volatile alcohols. They degrade naturally to form nontoxic wastes. Nonionic surfactants are water soluble and, because they have a neutral charge, are unaffected by dissolved minerals. Nonionic surfactants are used as wetting agents, dyes assistants and softening agents.
== Synonyms and Related Terms ==
non-ionic detergent
==Resources and Citations==
* Richard C. Wolbers, Nanette T. Sterman, Chris Stavroudis, Notes for Workshop on New Methods in the Cleaning of Paintings, J.Paul Getty Trust, Los Angeles, 1990
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 780
* Stephen R. Edwards, Bruce M. Bell, Mary Elizabeth King, Pest Control in Museums: a Status Report 1980, Association of Systematics Collections, Washington DC, 1980
* Tom Rowland, Noel Riley, A-Z Guide to Cleaning, Conserving and Repairing Antiques, Constable and Co., Ltd., London, 1981
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database
Nontannin

== Description ==
When vegetable tannins are extracted, other water-soluble components also dissolve into the tanning solutions. These are called nontannins or nontans. These additional components can be beneficial to the tanning process. Some nontans add color (brasilin, fisetin, etc. ) while others, such as sugars or starches, plump the leather. Organic acids and salts can also aid in the tanning process.
== Synonyms and Related Terms ==
nontans
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 797
* 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