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

I ron 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	1213
Detection of Acid-Soluble Extenders	14 to 17
Detection of Organic Colors and Lakes	18

C opper 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

U ltramarine 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 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 This standard does not purport to address the safety concerns 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.

12.1 Acid-insoluble extenders include barium sulfate, silica, and silicates. Alumina may also be found, in part, with this group.

14.1 Acid-soluble extenders include the alkaline earth carbonates or sulfates, magnesium carbonate, and alumina hydrate.