1、Designation: D 3721 05Standard Specification forSynthetic Red Iron Oxide Pigment1This standard is issued under the fixed designation D 3721; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in par
2、entheses 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 synthetic red iron oxide for usein paints and coatings manufactured by any of the following:1.1.1 Calcination of iron sal
3、ts.1.1.2 Precipitation from iron salts.1.1.3 Calcination of synthetic iron oxide.1.1.4 Product of organic reduction.2. Referenced Documents2.1 ASTM Standards:2D50 Test Methods for Chemical Analysis of Yellow, Or-ange, Red, and Brown Pigments Containing Iron andManganeseD 185 Test Methods for Coarse
4、Particles in Pigments,Pastes, and PaintsD 280 Test Methods for Hygroscopic Moisture (and OtherMatter Volatile Under the Test Conditions) in PigmentsD 387 Test Method for Color and Strength of ChromaticPigments with a Mechanical MullerD 1208 Test Methods for Common Properties of CertainPigments3. Com
5、position and Properties3.1 The pigment shall conform to the following require-ments:Fe2O3, min, % 96.0Moisture and other volatile matter, max, % 1.0Organic coloring matter noneCoarse particles (total residue retained on a 45-m(No. 325) sieve) max, %1.0Matter soluble in water, max, % 0.2pH value, min
6、 5.03.2 Inasmuch as iron oxide pigments are available in a rangeof colors, the mass color and, if desired by the purchaser, thecharacter of the tint formed by mixture with a white pigmentshall be within mutually agreed upon limits of a referencesample mutually agreed upon between the seller and thep
7、urchaser. This sample should be tested in accordance withTest Method D 387.4. 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 markings distinguishingbetween units of production appear samples s
8、hall be takenfrom different packages in the ratio of two samples for each10 000 lb (5000 kg), except that for shipments of less than10 000 lb two samples shall be taken. At the option of thepurchaser, the samples may be tested separately, or afterblending in equal quantities the samples from the sam
9、eproduction unit to form a composite sample.5. Test Methods5.1 Tests shall be conducted in accordance with the follow-ingASTM test methods. Test procedures not covered byASTMtest methods shall be mutually agreed upon between thepurchaser and the seller.5.1.1 Total Iron Oxide, Sulfur, and Organic Col
10、oringMatterTest Methods D50.5.1.2 Moisture and Other Volatile MatterTest MethodsD 280, Method A.5.1.3 Matter Soluble in WaterTest Methods D 1208.5.1.4 Coarse Particles in Dry PigmentsTest MethodsD 185.5.1.5 pH MinimumTest Methods D 1208.5.1.6 Mass Color and Tinting StrengthTest MethodD 387.6. Keywor
11、ds6.1 iron oxide; manganese; pigments1This specification is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.31 on Pigment Specifications.Current edition approved Sept. 1, 2005. Published Septem
12、ber 2005. Originallyapproved in 1978. Last previous edition approved in 1999 as D 3721 83 (1999).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Docum
13、ent Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Use
14、rs 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 time by the responsible technical committee and must be reviewed every
15、 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 will receive careful consideration at a meeting of theresponsible technic
16、al 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 ASTM 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).D3721052
