1、Designation: D765 87 (Reapproved 2014)Standard Specification forRaw and Burnt Sienna Pigments1This standard is issued under the fixed designation D765; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A nu
2、mber in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the pigments commerciallyknown as raw sienna and burnt sienna.2. Referenced Documents2.1 ASTM Standards:2D50 Te
3、st Methods for ChemicalAnalysis of Yellow, Orange,Red, and Brown Pigments Containing Iron and Manga-neseD185 Test Methods for Coarse Particles in PigmentsD280 Test Methods for Hygroscopic Moisture (and OtherMatter Volatile Under the Test Conditions) in PigmentsD387 Test Method for Color and Strength
4、 of ChromaticPigments with a Mechanical MullerD1208 Test Methods for Common Properties of CertainPigments3. Composition and Properties3.1 Dry PigmentsThe pigments shall conform to thefollowing requirements:3.1.1 Raw SiennaThe pigment shall be in a soft, dry formand shall be a hydrated oxide of iron
5、permeating a siliceousbase. The pigment shall conform to the requirements forcomposition prescribed in Table 1.3.1.2 Burnt SiennaThe pigment shall be produced by thecalcination of raw sienna and shall conform to the requirementsfor composition prescribed in Table 1.3.2 Paste in OilFor both raw and b
6、urnt sienna, the paste inoil shall be made by thoroughly grinding the pigment withlinseed oil (with or without a small amount of volatile thinner)together with (where necessary) small amounts of wetting ordispersing agents to produce a paste or semipaste of satisfac-tory consistency. As received, it
7、 shall not be caked in thecontainer and shall break up readily in linseed oil to form asmooth paint of brushing consistency. It shall mix readily in allproportions, without curdling, with linseed oil, turpentine, orvolatile petroleum spirits, or any mixture of these substances.The paste shall confor
8、m to the following requirements:Pigment, min, % 60Nonvolatile vehicle, min, of vehicle 80Moisture by distillation, max, % 2.0Coarse particles and skins (total residue retained on a No. 325 (45-m)sieve), max, % of dry pigment1.03.3 The mass color and character of the tint and the tintingstrength form
9、ed by a mixture with a white pigment shall bewithin mutually agreed upon limits of a standard acceptable toboth the purchaser and the seller.4. Sampling4.1 Two samples shall be taken at random from differentpackages from each lot, batch, days pack, or other unit ofproduction in a shipment. When no m
10、arkings distinguishingbetween units of production appear, samples shall be takenfrom different packages in the ratio of two samples for each 5tons (inch-pound or SI), except that for shipments of less than10 000 lb two samples shall be taken. At the option of thepurchaser, the samples may be tested
11、separately or afterblending in equal quantities the samples from the sameproduction unit to form a composite sample.5. Test Methods5.1 Tests shall be conducted in accordance with the appro-priate ASTM test methods. Test procedures not covered byASTM test methods shall be mutually agreed upon by thep
12、urchaser and the seller.5.1.1 Total Iron Oxide, Calcium Compound, and OrganicColoring MatterTest Methods D50.5.1.2 Coarse ParticlesTest Methods D185.5.1.3 Pigment and Linseed Oil in Paste in OilTest Meth-ods D1208.5.1.4 Moisture in Paste in OilTest Methods D280, exceptthat the sample shall be weighe
13、d instead of measured and theresults shall be expressed as percentage by weight instead ofvolume.5.1.5 Mass Color and Tinting StrengthTest Method D387.6. Keywords6.1 burnt sienna; iron; manganese; pigment; raw sienna1This specification is under the jurisdiction of ASTM Committee D01 on Paintand Rela
14、ted Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.31 on Pigment Specifications.Current edition approved Dec. 1, 2014. Published December 2014. Originallyapproved in 1944. Last previous edition approved in 2009 as D765 87 (2009).DOI: 10.1520/D0765-87R14.2Fo
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20、e obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, M
21、A 01923, Tel: (978) 646-2600; http:/ 1 Requirements for Composition of Raw and BurntSiennaRawSiennaBurntSiennaIron oxide (Fe2O2), min, % 38 40Calcium compounds (as CaO) max, % 5.0 5.0Moisture and other volatile matter, max, % 4.0 4.0Coarse particles (total residue retained on a No. 325(45-m) sieve), max, %2.0 2.0Organic colors, max, % none noneD765 87 (2014)2
