ASTM D50 : 90(2005)

Standard Test Methods for Chemical Analysis of Yellow, Orange, Red, and Brown Pigments Containing Iron and Manganese

Standard Details

1.1 These test methods cover procedures for the chemical analysis of yellow, orange, red, and brown pigments containing iron and manganese. The test methods apply specifically to the following pigments: synthetic hydrated yellow iron oxide, yellow ocher, red and brown iron oxides, raw and burnt umber, raw and burnt sienna, and venetian red.

1.2 The analytical procedures appear in the following order:

		ASTM
		Method
		Refer-
Dry Pigments	Sections	ences
Moisture and Other Volatile Matter		D 280
Loss on Ignition
Coarse Particles		D 185
Matter Soluble in Water		D 1208
Organic Coloring Matter
Iron Oxide	and
Calcium Compounds (Reported as CaO)	and
Sulfates Soluble in Hydrochloric Acid	and
Lead Chromate (in Ochers)
Calcium Carbonate (in Venetian Red)		C 25
Manganese (in Siennas and Umbers)	and

Pigment Pastes in Oil

Pigment Content		D 1208
Moisture and Other Volatile Matter		D 1208
Nonvolatile Matter in Vehicle
Moisture by Distillation		D 1208
Coarse Particles and Skins		D 185
Consistency (Stormer)		D 562

1.3 &solely-SI-units;

1.4 This standard does not purport to address all of the safety concerns, if any, 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.