1、Designation:D 261 75(Reapproved 1999)Standard Specification forIron Blue Pigment1This standard is issued under the fixed designation D 261;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 parenthe
2、ses 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 dry pigment commerciallyknown as Prussian blue,Chinese blue,Milori blue,or ironblue.2.Referenced Documents2.1 ASTM Standards:D
3、 387 Test Method for Color and Strength of Color Pig-ments with a Mechanical Muller2D 1135 Test Methods for Chemical Analysis of Blue Pig-ments33.Composition and Properties3.1 The pigment shall be the blue product formed by thereaction of a solution of iron salts with a ferrocyanide orferricyanide s
4、olution.It shall be free from admixture of anysubstances other than those added during manufacture,in smallamounts up to a total of 5%,for the purpose of improving thequality or working properties,or both,of the pigment.Extend-ers,and diluents such as barium sulfate,silica,silicates,calcium carbonat
5、e,calcium sulfate,magnesium carbonate,etc.,shall be absent.The pigment shall conform to the followingrequirements:Total matter soluble in water,max,%1.0Moisture,max,%8.0Organic colors or lakesnoneAcidity or alkalinitythe acidity or alkalinity of the aqueous extract,with methylorange indicator,shall
6、not exceed the chemical equivalent of 0.1%of sulfuricacid,calculated on the dry pigment.3.2 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 selle
7、r.NOTE1The physical properties and tests of iron blue,particularly thetinting strength,are considered a better measure of value than thepercentages of chemical constituents.4.Sampling4.1 Two samples shall be taken at random from differentpackages from each lot,batch,days pack,or other unit orproduct
8、ion in a shipment.When no markings distinguishingbetween units or production appear,samples shall be takenfrom different packages in the ratio of two samples for each 5tons(inch-pound or SWI),except that for shipments of lessthan 10 000 lb two samples shall be taken.At the option of thepurchaser,the
9、 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 be mutuall
10、y agreed upon between thepurchaser and the seller.5.2 IdentificationTest Methods D 1135.5.3 Extenders and DiluentsTest Methods D 1135.5.4 Total Matter Soluble in Water Matter soluble in watershall be determined by either of the following methods,asmutually agreed upon between the purchaser and the s
11、eller:5.4.1 Water-Soluble Matter by Extraction Test MethodsD 1135.5.4.2 Water-Soluble Salts by Electrical ConductivityTestMethods D 1135.5.5 Moisture in Dry PigmentMoisture shall be determinedby either of the following methods,as mutually agreed uponbetween the purchaser and the seller:5.5.1 Brabend
12、er Moisture TesterTest Methods D 1135.5.5.2 Toluene DistillationTest Methods D 1135.5.6 Organic Colors or LakesTest Methods D 1135.5.7 Mass Color and Tinting Strength Test Method D 387.6.Keywords6.1 iron blue;Milori blue;pigment;Prussian blue;tint;tinting strength1This specification is under the jur
13、isdiction of ASTM Committee D-1 on Paintand Related Coatings,Materials,andApplications,and is the direct responsibility ofSubcommittee D 01.31 on Pigment Specifications.Current edition approved Oct.31,1975.Published December 1975.Originallypublished as D 261 27 T.Last previous edition D 261 47(1970)
14、.2Annual Book of ASTM Standards,Vol 06.01.3Annual Book of ASTM Standards,Vol 06.03.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionw
15、ith any item mentioned in this standard.Users of this standard are expressly advised that determination of the validity of any suchpatent rights,and the risk of infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible techn
16、ical 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 Headquarters.Your comments will receive careful consideration at a meeting of the responsibletechnical committee,which you may attend.If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards,100 Barr Ha
