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This specification covers raw and burnt umber pigments. The pigments could be in a dry or paste in oil form. Dry pigments should conform to the composition requirements for iron oxide content, calcium compound content, moisture and other volatile matter content, coarse particle content, and organic color content. Raw umber dry pigments should be in a soft, dry form and made from a hydrated iron oxide permeating a siliceous base and free of admixtures. Burnt umber dry pigments should be produced by raw amber calcination and free of admixtures. Paste in oil pigments should conform to the specified pigment content, nonvolatile vehicle content, moisture by distillation content, and coarse particle and skin content. Both raw and burnt umber paste in oil pigments should be made by thoroughly grinding the pigment with linseed oil with a small amount of wetting or dispersing agents.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D50 Test Methods for Chemical Analysis of Yellow, Orange, Red, and Brown Pigments Containing Iron and Manganese
D185 Test Methods for Coarse Particles in Pigments
D280 Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments
D387 Test Method for Color and Strength of Chromatic Pigments with a Mechanical Muller
D1208 Test Methods for Common Properties of Certain Pigments
ICS Number Code 87.060.10 (Pigments and extenders)
UNSPSC Code 31211503(Pigment paints)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D763-06(2012), Standard Specification for Raw and Burnt Umber Pigments, ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top