1、Designation: D 765 87 (Reapproved 2003)Standard Specification forRaw and Burnt Sienna Pigments1This standard is issued under the fixed designation D 765; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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:D 50
3、 Test Methods for Chemical Analysis of Yellow, Or-ange, Red, and Brown Pigments Containing Iron andManganese2D 185 Test Methods for Coarse Particles in Pigments,Pastes, and Paints2D 280 Test Methods of Hygroscopic Moisture (and OtherMatter Volatile Under the Test Conditions) in Pigments2D 387 Test M
4、ethod for Color and Strength of ChromaticPigments with a Mechanical Muller3D 1208 Test Methods for Common Properties of CertainPigments33. 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 sha
5、ll be a hydrated oxide of iron 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
6、 Paste in OilFor both raw and burnt sienna, the pastein oil 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-to
7、ry consistency. As received, it 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 su
8、bstances.The paste shall conform 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 ti
9、nt and the tintingstrength formed 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 ofprod
10、uction in a shipment. When no markings 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 thepurcha
11、ser, the samples may be tested 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
12、be mutually agreed upon by thepurchaser and the seller.5.1.1 Total Iron Oxide, Calcium Compound, and OrganicColoring MatterTest Methods D 50.5.1.2 Coarse ParticlesTest Methods D 185.1This specification is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Appli
13、cations and is the direct responsibility ofSubcommittee D01.31 on Pigment Specifications.Current edition approved Oct. 1, 2003. Published October 2003. Originallyapproved in 1944. Last previous edition approved in 1987 as D 765 87 (1999).2Annual Book of ASTM Standards, Vol 06.03.3Annual Book of ASTM
14、 Standards, Vol 06.01.TABLE 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.
15、0 2.0Organic colors, max, % none none1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.1.3 Pigment and Linseed Oil in Paste in OilTest Meth-ods D 1208.5.1.4 Moisture in Paste in OilTest Methods D 280, exceptthat the sample shall be w
16、eighed instead of measured and theresults shall be expressed as percentage by weight instead ofvolume.5.1.5 Mass Color and Tinting StrengthTest MethodD 387.6. Keywords6.1 burnt sienna; iron; manganese; pigment; raw siennaASTM International takes no position respecting the validity of any patent righ
17、ts asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any
18、time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments wil
19、l receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by AST
20、M International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be 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).D 765 87 (2003)2
