ASTM D5724-06

Standard Specification for Gouache Paints

ABSTRACT
This specification establishes the requirements for composition, physical properties, performance, and labeling of gouache paints. Covered here are pigments, vehicles, and additives, wherein the requirements for which are included for pigment identification, lightfastness, and consistency. Some pigments meeting the lightfastness requirements in this specification are listed herein. Also, in order to identify other pigments that meet these requirements, instructions are given for test specimen preparation and the respective test methods for determining relative lightfastness. The conditions not covered in this specification that affect gouache paints are substrate, environmental conditions, storage, vehicles, pigments, additives, inerts, preparation of samples, coarse particles, fineness of dispersions, consistency, freeze-thaw stability, opacity (hiding power), bleeding, and color specification.
SCOPE
1.1 This specification establishes requirements for composition, physical properties, performance, and labeling of gouache paints.
1.2 This specification covers pigments, vehicles, and additives. Requirements are included for pigment identification, lightfastness, and consistency.
1.3 lists some pigments meeting the lightfastness requirements in this specification. In order to identify other pigments that meet these requirements, instructions are given for test specimen preparation. Test methods for determining relative lightfastness are referenced.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 This test method is used to test opacity of paints. Several drawdown bars having different aperture sizes are used.

General Information

• Status: Historical
• Publication Date: 31-Mar-2006
• ICS: 87.040 - Paints and varnishes
• ICS: 97.195 - Items of art and handicrafts. Cultural property and heritage
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.57 - Artist Paints and Related Materials

Relations

• Replaces: ASTM D5724-05 - Standard Specification for Gouache Paints
• Effective Date: 01-Apr-2006
• Replaced By: ASTM D5724-06(2010) - Standard Specification for Gouache Paints
• Effective Date: 01-Dec-2010
• Referred By: ASTM D4303-10(2022) - Standard Test Methods for Lightfastness of Colorants Used in Artists' Materials
• Effective Date: 01-Apr-2006

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: D5724 – 06
Standard Specification for
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Gouache Paints
This standard is issued under the fixed designation D5724; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 Other Documents:
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Colour Index
1.1 This specification establishes requirements for compo-
sition, physical properties, performance, and labeling of
3. Terminology
gouache paints.
3.1 Definitions:
1.2 This specification covers pigments, vehicles, and addi-
3.1.1 colour index name, n—consists of the category (type
tives. Requirements are included for pigment identification,
ofdyeorpigment),generalhue,andanassignednumbergiven
lightfastness, and consistency.
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to a colorant in the Colour Index as an international identifi-
1.3 Table 1 lists some pigments meeting the lightfastness
cation system.
requirements in this specification. In order to identify other
3.1.1.1 Discussion—For example, the Colour Index Name
pigments that meet these requirements, instructions are given
of one phthalocyanine blue pigment is Pigment Blue 15 (PB
for test specimen preparation. Test methods for determining
15).
relative lightfastness are referenced.
3.1.2 colour index number, n—a five-digit number given in
1.4 The values stated in SI units are to be regarded as the
the Colour Index that describes the chemical constitution of a
standard. The values given in parentheses are for information
colorant.
only.
3.1.2.1 Discussion—For example, the Colour Index Num-
2. Referenced Documents ber of one phthalocyanine blue pigment is 74160.
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3.2 Definitions of Terms Specific to This Standard:
2.1 ASTM Standards:
3.2.1 gouache paint, n—a pigment dispersion in a water
D185 Test Methods for Coarse Particles in Pigments
soluble gum/resin vehicle that dries water soluble and is
D279 Test Methods for Bleeding of Pigments
formulated primarily for relatively opaque and matte applica-
D476 Classification for Dry Pigmentary Titanium Dioxide
tions.
Products
3.3 Appearance terms used in this standard are defined in
D823 Practices for Producing Films of Uniform Thickness
Terminology E284.
of Paint, Varnish, and Related Products on Test Panels
D1210 Test Method for Fineness of Dispersion of Pigment-
4. Significance and Use
Vehicle Systems by Hegman-Type Gage
4.1 This specification establishes quality requirements and
D1535 PracticeforSpecifyingColorbytheMunsellSystem
provides a basis for common understanding among producers,
D4236 Practice for Labeling Art Materials for Chronic
distributors, and users.
Health Hazards
4.2 It is not intended that all paints meeting the require-
D4303 TestMethodsforLightfastnessofColorantsUsedin
ments be identical nor of uniform excellence in all respects.
Artists’ Materials
Variations in manufacture, not covered by this specification,
E284 Terminology of Appearance
maycausesomeartiststopreferonebrandoveranother,either
of which may be acceptable under this specification.
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5. Labeling Requirements
This specification is under the jurisdiction ofASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
5.1 Pigment(s) Identification:
Subcommittee D01.57 on Artist Paints and Related Materials.
5.1.1 Every label shall include for each pigment contained
Current edition approved April 1, 2006. Published April 2006. Originally
approved in 1995. Last previous edition approved in 2005 as D5724–05. DOI: in the paint the information underlined in Table 1, which
10.1520/D5724-06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM The Society of Dyers and Colourists, Colour Index , 3rd ed., 5 volumes and
Standards volume information, refer to the standard’s Document Summary page on revisions, Available from the American Association of Textile Chemists and
the ASTM website. Colorists, P.O. Box 12215, Research Triangle Park, NC 27709.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D5724 – 06
includes the Common Name, Colour Index Name, and any
additional terms necessary to identify the form of the pigment.
TABLE 1 Suitable Pigments List
NOTE 1—Underlined information in the table and lightfastness category shall be included on every label.
KEY
Lightfastness Category:
Lightfastness I Excellent Lightfastness
Lightfastness II Very Good Lightfastness
Abbreviations used in Colour Index Names:
PB Pigment Blue
PBk Pigment Black
PBr Pigment Brown
PG Pigment Green
PO Pigment Orange
PR Pigment Red
PV
...