1、Designation:D26305(Reapproved 2019)Standard Specification forChrome Oxide Green Pigment1This standard is issued under the fixed designation D263;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 pa
2、rentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers the dry pigment commerciallyknown as chr
3、ome oxide green.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Princ
4、iples for 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:2D126 Test Methods for Analysis of Yellow,Orange,andGreen Pigments Containing Lead Chromate and Chr
5、o-mium Oxide GreenD185 Test Methods for Coarse Particles in PigmentsD280 Test Methods for Hygroscopic Moisture(and OtherMatter Volatile Under the Test Conditions)in Pigments3.Composition and Properties3.1 The pigment shall consist of practically pure chromiumsesqui-oxide(Cr2O3)without any admixture,
6、and shall con-form to the following requirements:Total chromium(calculated as Cr2O3),min,%98Total matter soluble in water,max,%0.5Moisture and other volatile matter,max,%0.5Coarse particles(total residue retained on a No.325(45-m)sieve),max,%1.0Organic colors or lakesnone3.2 The mass color and chara
7、cter 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,batch,days pack,or other u
8、nit 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 each4545 kg(10 000 lb)except that for shipments of less than10 000 lb two samples shall be taken.At the option of thepurchase
9、r,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 follow-ing methods where applicable.Test procedures not covered byASTM test methods shall
10、be mutually agreed upon between thepurchaser and the seller.5.2 Chromium ContentTest Methods D126.5.3 Total Matter Soluble in WaterTest Methods D126.5.4 Moisture ContentTest Method D280.5.5 Coarse ParticlesTest Methods D185.5.6 Organic Colors and LakesTest Methods D126.6.Keywords6.1 chrome oxide gre
11、en;chromium sesqui-oxide;pigment;tint;tinting strength;white pigment1This 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 Ma
12、y 1,2019.Published May 2019.Originallyapproved in 1927.Last previous edition approved in 2011 as D263 05(2011).DOI:10.1520/D0263-05R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informa
13、tion,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 estab
14、lished 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 connection wi
15、th 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 technic
16、al 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 Standards
