ASTM D718-86 (2020) pdf free.Standard Test Methods for Analysis of Aluminum Silicate Pigment.
1.1 These test methods cover the analysis of aluminumsilicate pigment.
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 standard does not purport to address all of thesafety concerns，if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety，health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 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.
2.1 ASTM Standards:
D234 Specification for Raw Linseed Oil (Withdrawn 2007)3D280 Test Methods for Hygroscopic Moisture (and OtherMatter Volatile Under the Test Conditions) in PigmentsD717 Test Methods for Analysis of Magnesium SilicatePigment
D1193 Specification for Reagent Water
D1208 Test Methods for Common Properties of CertainPigments
D2448 Test Method for Water-Soluble Salts in Pigments byMeasuring the Specific Resistance of the Leachate of thePigment.
3.1 These test methods may be used to confirm the statedaluminum oxide and SiO,content of aluminum silicate forquality control.
4.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicated, it is intended that all reagents shallconform to the specifications of the Committee on AnalyticalReagents of the American Chemical Society,’ where suchspecifications are available.Other grades may be used, pro-vided it is first ascertained that the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determination.
4.2 Unless otherwise indicated, references to water shall beunderstood to mean Type l of Specification D1193.
5.1 Carefully weigh out the proportion of the standardextender pigment and standard zinc oxide mutually agreedupon, and rub up to a fairly stiff paste with a glass muller on aglass plate or stone slab with raw linseed oil conforming toSpecification D234.Note the volume of the oil required.Prepare a similar paste with the sample using the same weightof pigment, volume of oil, and number of strokes of the glassmuller as used in the preparation of the paste of the standardpigments. Spread the pastes adjacently on a microscope slide,draw a scraper lightly across them to present them on an evenplane, and judge the color immediately.ASTM D718 pdf download.