1.1 These test methods cover procedures for the chemical analysis of blue pigments known commercially as iron blue, copper phthalocyanine blue, and ultramarine blue.

1.2 The analytical procedures appear in the following order:

Sections IRON BLUE PIGMENTS Identification 6 Moisture by the Brabender Moisture Tester 7 and 8 Moisture by Toluene Distillation 9 Water-Soluble Matter by Extraction 10 Water-Soluble Salts by Electrical Conductivity 11 Detection of Acid-Insoluble Extenders 12 and 13 Detection of Acid-Soluble Extenders 14 to 17 Detection of Organic Colors and Lakes 18 COPPER PHTHALOCYANINE BLUE PIGMENTS Identification 19 Moisture and Other Volatile Matter 20 Detection of Basic Dye Derivatives 21 Detection of Other Organic Coloring Matter 22 Detection of Ultramarine Blue 23 Detection of Iron Blue 24 ULTRAMARINE BLUE Identification 25 Moisture and Other Volatile Matter 26 Water-Soluble Matter 27 Detection of Basic Dye Derivatives 28 Detection of Other Organic Coloring Matter 29

1.3 This standard does not purport to address the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.>