ASTM D2371-85(1999)

Standard Test Method for Pigment Content of Solvent-Reducible Paints

SCOPE
1.1 This test method covers the procedure for the quantitative separation of the vehicle from the pigment in solvent-reducible coatings.  
1.2 This test method has been proven to be applicable to the following types of paints: white linseed oil outside house paint, white soya and phthalic alkyd enamel, white linseed o-phthalic alkyd enamel, red lead primer, zinc chromate primer, flat white inside enamel, white epoxy enamel, white vinyl toluene modified alkyd, and white amino modified baking enamel. It is considered to be applicable to most solvent-reducible paints.  
1.3 This standard does not purport to address all of 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.> Specific precautionary statements are given in Section 6.

General Information

• Status: Historical
• Publication Date: 09-May-1999
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.21 - Chemical Analysis of Paints and Paint Materials

Relations

• Replaced By: ASTM D2371-85(2005) - Standard Test Method for Pigment Content of Solvent-Reducible Paints
• Effective Date: 01-Jan-2005
• Referred By: ASTM D3720-90(2019) - Standard Test Method for Ratio of Anatase to Rutile in Titanium Dioxide Pigments by X-Ray Diffraction
• Effective Date: 10-May-1999
• Referred By: ASTM C1315-19 - Standard Specification for Liquid Membrane-Forming Compounds Having Special Properties for Curing and Sealing Concrete
• Effective Date: 10-May-1999
• Referred By: ASTM D2372-85(2022) - Standard Practice for Separation of Vehicle From Solvent-Reducible Paints
• Effective Date: 10-May-1999
• Referred By: ASTM D6763-16(2022) - Standard Guide for Testing Exterior Wood Stains and Clear Water Repellents
• Effective Date: 10-May-1999
• Referred By: ASTM D6577-15(2019) - Standard Guide for Testing Industrial Protective Coatings
• Effective Date: 10-May-1999
• Referred By: ASTM D5146-10(2019) - Standard Guide to Testing Solvent-Borne Architectural Coatings
• Effective Date: 10-May-1999
• Referred By: ASTM D2205-20 - Standard Guide for Selection of Tests for Traffic Paints
• Effective Date: 10-May-1999
• Referred By: ASTM D1844-86(2020) - Standard Test Methods for Chemical Analysis of Basic Lead Silicochromate
• Effective Date: 10-May-1999
• Referred By: ASTM D1301-91(2020) - Standard Test Methods for Chemical Analysis of White Lead Pigments
• Effective Date: 10-May-1999

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D2371–85(Reapproved1999)
Standard Test Method for
Pigment Content of Solvent-Reducible Paints
This standard is issued under the fixed designation D 2371; 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 (e) indicates an editorial change since the last revision or reapproval.
4-oz (120-mL) bottles.Atwo, four, or six-place head can be used with the
1. Scope
bottles and an eight-place head can be used with the tubes.
1.1 This test method covers the procedure for the quantita-
4.2 Centrifuge Tube, 90-mL, heavy-walled. In place of the
tive separation of the vehicle from the pigment in solvent-
90-mL centrifuge tube a 4-oz (120-mL) screw cap bottle with
reducible coatings.
vinyl-lined screw cap may be used.
1.2 This test method has been proven to be applicable to the
4.3 Laboratory Oven, vented and capable of maintaining a
following types of paints: white linseed oil outside house paint,
temperature of 105 6 2°C.
white soya and phthalic alkyd enamel, white linseed o-phthalic
4.4 Syringe, 5-mL.
alkyd enamel, red lead primer, zinc chromate primer, flat white
4.5 Water Bath.
inside enamel, white epoxy enamel, white vinyl toluene
modified alkyd, and white amino modified baking enamel. It is
5. Solvents
considered to be applicable to most solvent-reducible paints.
5.1 Ethyl Ether or Petroleum Ether: (Warning—See 6.1).
1.3 This standard does not purport to address all of the
5.2 Extraction Mixture—Mix 10 volumes of ethyl ether, 6
safety concerns, if any, associated with its use. It is the
volumes of benzene or toluene, 4 volumes of methyl alcohol,
responsibility of the user of this standard to establish appro-
and 1 volume of acetone (Warning—See 6.2, 6.3, and 6.4).
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific hazard
6. Hazards
statements are given in Section 6.
6.1 Ethyl Ether and Petroleum Ether— Flammable. Vapor
2. Referenced Documents
isharmful.Maybefatalifinhaledorswallowed.Useonlywith
adequate ventilation.Avoid prolonged contact with skin.Avoid
2.1 ASTM Standards:
contact with flame, hot surface, or sparks. Do not get in eyes,
D 2698 Test Method for Determination of the Pigment
on skin, or on clothing. Refer to suppliers’ Material Safety
Content of Solvent-Reducible Paints by High-Speed Cen-
Data Sheet.
trifuging
6.2 Acetone—Flammable. Vapor is harmful. May be fatal if
3. Significance and Use
inhaled or swallowed. Use only with adequate ventilation.
Avoid prolonged contact with skin. Avoid contact with flame,
3.1 This test method is suitable for setting specifications for
hot surface, or sparks. Do not get in eyes, on skin, or on
the pigment content of solvent-reducible paints as well as for
clothing. Refer to suppliers’ Material Safety Data Sheet.
monitoring manufacturing quality control.
6.3 Methyl Alcohol—Flammable. May be fatal or cause
3.2 This test method provides the isolated pigment fraction
blindness if swallowed. Cannot be made nonpoisonous. Harm-
from solvent-reducible paints that may be used for pigment
ful if inhaled. Keep away from heat, sparks, or open flame.
analysis.
Avoid breathing vapor. Use only with adequate ventilation.
4. Apparatus
Refer to suppliers’ Material Safety Data Sheet.
6.4 Benzene has been declared carcinogenic.
4.1 Centrifuge, explosion-proof, capable of developing
6.4.1 Benzene and Toluene—Flammable. Vapors and liquid
1000 to 2000 g.
are harmful and may be fatal if swallowed. Keep away from
NOTE 1—The centrifuge should be equipped with a suitable head to
heat, sparks, or open flame. Keep in a well-closed container.
take the proper size trunnion cups necessary for use of the 90-mLtubes or
Avoid breathing vapor. Avoid contact with eyes, skin, or
clothing. Refer to suppliers’ Material Safety Data Sheet.
This test method is under the jurisdiction of ASTM Committee D-1 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of The sole source of supply of bottles and caps, Cat. No. S9185C, 4-oz bottle,
Subcommittee D01.21 on Chemical Analysis of Paint and Paint Materials. known to the committee at this time is Sargent Welch Scientific, 7300 N. Linder
Current edition approved May 31, 1985. Published July 1985. Originally Av
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