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ASTM D50-90(2023)

(Test Method)

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

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

SIGNIFICANCE AND USE
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.
SCOPE
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.

General Information

Status
Published
Publication Date
31-May-2023
ICS
87.060.10 - Pigments and extenders
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.31 - Pigment Specifications
Current Stage
Ref Project

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ASTM D50-90(2023) - Standard Test Methods for Chemical Analysis of Yellow, Orange, Red, and Brown Pigments Containing Iron and ManganeseASTM D50-90(2023) - Standard Test Methods for Chemical Analysis of Yellow, Orange, Red, and Brown Pigments Containing Iron and Manganese
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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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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.
Designation: D50 − 90 (Reapproved 2023)
Standard Test Methods for
Chemical Analysis of Yellow, Orange, Red, and Brown
1
Pigments Containing Iron and Manganese
This standard is issued under the fixed designation D50; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 These test methods cover procedures for the chemical
1.5 This international standard was developed in accor-
analysis of yellow, orange, red, and brown pigments containing
dance with internationally recognized principles on standard-
iron and manganese. The test methods apply specifically to the
ization established in the Decision on Principles for the
following pigments: synthetic hydrated yellow iron oxide,
Development of International Standards, Guides and Recom-
yellow ocher, red and brown iron oxides, raw and burnt umber,
mendations issued by the World Trade Organization Technical
raw and burnt sienna, and venetian red.
Barriers to Trade (TBT) Committee.
1.2 The analytical procedures appear in the following order:
2. Referenced Documents
ASTM
Method
2
2.1 ASTM Standards:
Refer-
Dry Pigments Sections ences C25 Test Methods for Chemical Analysis of Limestone,
Quicklime, and Hydrated Lime
Moisture and Other Volatile Matter 6 D280
D185 Test Methods for Coarse Particles in Pigments
Loss on Ignition 7
Coarse Particles 8 D185
D280 Test Methods for Hygroscopic Moisture (and Other
Matter Soluble in Water 9 D1208
Matter Volatile Under the Test Conditions) in Pigments
Organic Coloring Matter 10
D562 Test Method for Consistency of Paints Measuring
Iron Oxide 11 and 12
Calcium Compounds (Reported as CaO) 13 and 14
Krebs Unit (KU) Viscosity Using a Stormer-Type Viscom-
Sulfates Soluble in Hydrochloric Acid 15 and 16
eter
Lead Chromate (in Ochers) 17
D1193 Specification for Reagent Water
Calcium Carbonate (in Venetian Red) 18 C25
Manganese (in Siennas and Umbers) 19 and 20 D1208 Test Methods for Common Properties of Certain
Pigments
Pigment Pastes in Oil
E11 Specification for Woven Wire Test Sieve Cloth and Test
Pigment Content 21 D1208
Sieves
Moisture and Other Volatile Matter 22 D1208
Nonvolatile Matter in Vehicle 23
3. Significance and Use
Moisture by Distillation 24 D1208
Coarse Particles and Skins 25 D185
3.1 These test methods compile in one place, recommended
Consistency (Stormer) 26 D562
procedures for analyzing inorganic colored pigments. These
1.3 The values stated in SI units are to be regarded as
pigments are used extensively in paints, and for this reason
standard. No other units of measurement are included in this
their compositions are important to the formulators and user.
standard.
4. Preparation of Sample
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 Mix the sample thoroughly and take a representative
responsibility of the user of this standard to establish appro-
portion for analysis. Reduce any lumps or coarse particles to a
fine powder by grinding. Grind extracted pigments to pass a
No. 80 (180 μm) sieve (see Specification E11 for detailed
1
These test methods are under the jurisdiction of ASTM Committee D01 on
Paint and Related Coatings, Materials, and Applications and are the direct
2
responsibility of Subcommittee D01.31 on Pigment Specifications. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved June 1, 2023. Published June 2023. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1917. Last previous edition approved in 2019 as D50 – 90 (2019). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D0050-90R23. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D50 − 90 (2023)
requirements). Discard any skins that do not pass through the of ethyl alcohol (95 %) and decant as before. Boil the residue
sieve. Mix the finely ground pigment thoroughly. with 25 mL of 1 N alcoholic sodium hydroxide (NaOH)
solution and again decant. Boil another 2 g portion of the
5. Purity of Reagents
sample with 25 mL of chloroform, let se
...

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