ASTM_D_769_-_01_2019.pdf

Designation:D76901(Reapproved 2019)Standard Specification forBlack Synthetic Iron Oxide1This standard is issued under the fixed designation D769;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 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 pigment commerciallyknown as black synthetic iron oxide.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 Principles 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:2D50 Test 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 of ChromaticPigments with a Mechanical MullerD1208 Test Methods for Common Properties of CertainPigmentsD3872 Test Method for Ferrous Iron in Iron Oxides3.Composition and Properties3.1 The pigment shall be a manufactured ferrous-ferricoxide obtained by chemical reaction.It shall be a soft dry finelypowdered pigment,free of admixtures of other substances andshall conform to the following requirements:Total ferrous and ferric oxide,min%93Ferrous oxide(FeO),min,%20Water-soluble matter,max,%0.5Moisture and other volatile matter,max,%1.0Coarse particles(total residue retained on a No.325(45-m)sieve),max,%0.5Hydrogen ion concentration(pH value)4.5 to 8.53.2 The 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,batch,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 each4540 kg or 10 000 lb,except that for shipments of less than 10000 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 sameproduction unit to form a composite sample.5.Test Methods5.1 Tests shall be conducted in accordance with the appro-priate test methods.Test procedures not covered by ASTM testmethods shall be mutually agreed upon between the purchaserand the seller.5.1.1 Total Iron OxidesTest Methods D50.5.1.2 Ferrous Iron in Iron OxidesTest Method D3872.5.1.3 Water Soluble Matter,Maximum,PercentTest Meth-ods D1208.5.1.4 Moisture and Other Volatile Matter,Maximum,PercentTest Methods D280.5.1.5 Coarse Particles(Total Residue Retained on a 325-mesh sieve(45 m),Maximum,PercentTest Methods D185.5.1.6 Hydrogen Ion Concentration(pH value)Test Meth-ods D1208.5.1.7 Mass Color and Tinting StrengthTest Method D387.6.Keywords6.1 black iron oxide;ferric oxide;ferrous oxide;iron oxide;manganese;pigment;synthetic iron oxide1This 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 June 1,2019.Published June 2019.Originallyapproved in 1944.Last previous edition approved in 2012 as D769 01(2012).DOI:10.1520/D0769-01R19.2For 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 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 established 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 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 technical committee and must be reviewed every five years