1、Designation:D372205(Reapproved 2019)Standard Specification forNatural Red and Brown Iron Oxide Pigments1This standard is issued under the fixed designation D3722;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisi
2、on.A number 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 dry and wet ground naturallyoccurring iron oxide,dry and wet ground calcined naturallyoccurring iron oxide,a
3、nd mixtures of these with synthetic ironoxides.These pigments are suitable for use in paints,coatings,and many other applications.1.2 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for
4、theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D50 Test Methods for ChemicalAnalysis of Yellow,Orange,Red,and Brown Pigments Containing Iron and Manga-nese
5、D185 Test Methods for Coarse Particles in PigmentsD280 Test Methods for Hygroscopic Moisture(and OtherMatter Volatile Under the Test Conditions)in PigmentsD1208 Test Methods for Common Properties of CertainPigments3.Composition and Properties3.1 The pigments shall conform to the following require-me
6、nts:Total iron as Fe2O3,min,%40.0Moisture and other volatile matter,max,%1.0Organic coloring matternoneTotal sulfates expressed as SO3,max,%2.0Matter soluble in water,max,%2.0Matter soluble in water,max,%(primer pigments)1.0Coarse particles(total residue retained on a No.325(45-m)sieve)max,%2.03.2 T
7、he mass color and character of the tint 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,bat
8、ch,days pack,or other unit ofproduction 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 take
9、n.At the option of thepurchaser,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 b
10、yASTM test methods shall be mutually agreed upon between thepurchaser and the seller.5.1.1 Total Iron Oxide,Sulfur,and Organic ColoringMatterTest Methods D50.5.1.2 Moisture and Other Volatile MatterTest MethodD280,Method A.5.1.3 Matter Soluble in WaterTest Method D1208.5.1.4 Coarse Particles in Dry
11、PigmentsTest MethodD185.6.Keywords6.1 iron oxide;natural brown;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
12、 May 1,2019.Published May 2019.Originallyapproved in 1978.Last previous edition approved in 2011 as D3722 05(2011).DOI:10.1520/D3722-05R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume inf
13、ormation,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization e
14、stablished in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 ASTM International takes no position respecting the validity of any patent rights asserted in connectio
15、n 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 time by the responsible tec
16、hnical 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 will 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 Stand