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ASTM D50-90(2023)

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

 6

 D280

Loss on Ignition

 7

 

Coarse Particles

 8

 D185

Matter Soluble in Water

 9

 D1208

Organic Coloring Matter

10

 

Iron Oxide

11 and 12

 

Calcium Compounds (Reported as CaO)

13 and 14

 

Sulfates Soluble in Hydrochloric Acid

15 and 16

 

Lead Chromate (in Ochers)

17

 

Calcium Carbonate (in Venetian Red)

18

 C25

Manganese (in Siennas and Umbers)

19 and 20

 

 

Pigment Pastes in Oil

 

 

 

Pigment Content

21

 D1208

Moisture and Other Volatile Matter

22

 D1208

Nonvolatile Matter in Vehicle

23

 

Moisture by Distillation

24

 D1208

Coarse Particles and Skins

25

 D185

Consistency (Stormer)

26

 D562

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 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, health, and environmental practices and determine the applicability of regulatory limitations prior to us.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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:

  • Dry Pigments
    • Moisture and Other Volatile Matter - Section 6 - ASTM Method D280
    • Loss on Ignition - Section 7
    • Coarse Particles - Section 8 - ASTM Method D185
    • Matter Soluble in Water - Section 9 - ASTM Method D1208
    • Organic Coloring Matter - Section 10
    • Iron Oxide - Sections 11 and 12
    • Calcium Compounds (Reported as CaO) - Sections 13 and 14
    • Sulfates Soluble in Hydrochloric Acid - Sections 15 and 16
    • Lead Chromate (in Ochers) - Section 17
    • Calcium Carbonate (in Venetian Red) - Section 18 - ASTM Method C25
    • Manganese (in Siennas and Umbers) - Sections 19 and 20
  • Pigment Pastes in Oil
    • Pigment Content - Section 21 - ASTM Method D1208
    • Moisture and Other Volatile Matter - Section 22 - ASTM Method D1208
    • Nonvolatile Matter in Vehicle - Section 23
    • Moisture by Distillation - Section 24 - ASTM Method D1208
    • Coarse Particles and Skins - Section 25 - ASTM Method D185
    • Consistency (Stormer) - Section 26 - ASTM Method D562

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 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

3.1 These test methods compile in one place, recommended procedures for analyzing inorganic colored pigments.

These pigments are used extensively in paints, and for this reason their compositions are important to the formulators and user.

SDO ASTM: ASTM International
Document Number D50
Publication Date June 1, 2023
Language en - English
Page Count 5
Revision Level 90(2023)
Supercedes
Committee D01.31
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