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ASTM D5724-16(2021)

(Specification)

Standard Specification for Gouache Paints

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.
SIGNIFICANCE AND USE
4.1 This specification establishes quality requirements and provides a basis for common understanding among producers, distributors, and users.  
4.2 It is not intended that all paints meeting the requirements be identical nor of uniform excellence in all respects. Variations in manufacture, not covered by this specification, may cause some artists to prefer one brand over another, either of which may be acceptable under this 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 Table 1 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 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-Oct-2021
ICS
87.040 - Paints and varnishes
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
Current Stage
Ref Project

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ASTM D5724-16(2021) - Standard Specification for Gouache PaintsASTM D5724-16(2021) - Standard Specification for Gouache Paints
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ASTM D5724-16(2021) - Standard Specification for Gouache Paints
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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:D5724 −16 (Reapproved 2021)
Standard Specification for
1
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 D4236Practice for Labeling Art Materials for Chronic
Health Hazards
1.1 This specification establishes requirements for
D4303Test Methods for Lightfastness of Colorants Used in
composition, physical properties, performance, and labeling of
Artists’Materials
gouache paints.
E284Terminology of Appearance
1.2 This specification covers pigments, vehicles, and addi-
2.2 Other Documents:
tives. Requirements are included for pigment identification, 3
Colour Index
lightfastness, and consistency.
3. Terminology
1.3 Table 1 lists some pigments meeting the lightfastness
requirements in this specification. In order to identify other 3.1 Definitions:
pigments that meet these requirements, instructions are given 3.1.1 colour index name, n—consists of the category (type
for test specimen preparation. Test methods for determining ofdyeorpigment),generalhue,andanassignednumbergiven
3
relative lightfastness are referenced. to a colorant in the Colour Index as an international identifi-
cation system.
1.4 The values stated in SI units are to be regarded as the
3.1.1.1 Discussion—For example, the Colour Index Name
standard. The values given in parentheses are for information
of one phthalocyanine blue pigment is Pigment Blue 15 (PB
only.
15).
1.5 This international standard was developed in accor-
3.1.2 colour index number, n—a five-digit number given in
dance with internationally recognized principles on standard-
the Colour Index that describes the chemical constitution of a
ization established in the Decision on Principles for the
colorant.
Development of International Standards, Guides and Recom-
3.1.2.1 Discussion—Forexample,theColourIndexNumber
mendations issued by the World Trade Organization Technical
of one phthalocyanine blue pigment is 74160.
Barriers to Trade (TBT) Committee.
3.2 Definitions of Terms Specific to This Standard:
2. Referenced Documents
3.2.1 gouache paint, n—a pigment dispersion in a water
2
soluble gum/resin vehicle that dries water soluble and is
2.1 ASTM Standards:
formulated primarily for relatively opaque and matte applica-
D185Test Methods for Coarse Particles in Pigments
tions.
D279Test Methods for Bleeding of Pigments
D476Classification for Dry Pigmentary Titanium Dioxide
3.3 Appearance terms used in this standard are defined in
Products
Terminology E284.
D823Practices for Producing Films of Uniform Thickness
4. Significance and Use
of Paint, Coatings and Related Products on Test Panels
D1210Test Method for Fineness of Dispersion of Pigment-
4.1 This specification establishes quality requirements and
Vehicle Systems by Hegman-Type Gage
provides a basis for common understanding among producers,
D1535Practicefor Specifying Color by the MunsellSystem
distributors, and users.
4.2 It is not intended that all paints meeting the require-
1
This specification is under the jurisdiction ofASTM Committee D01 on Paint
ments be identical nor of uniform excellence in all respects.
andRelatedCoatings,Materials,andApplicationsandisthedirectresponsibilityof
Variations in manufacture, not covered by this specification,
Subcommittee D01.57 on Artist Paints and Related Materials.
maycausesomeartiststopreferonebrandoveranother,either
Current edition approved Nov. 1, 2021. Published November 2021. Originally
approved in 1995. Last previous edition approved in 2016 as D5724–16. DOI: of which may be acceptable under this specification.
10.1520/D5724-16R21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. 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
1

---------------------- Page: 1 ----------------------
D5724−16 (2021)
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 Excelle
...

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1.2 In the case of conflict between a requirement of a product specification and a requirement of this specification, the product specification shall prevail. In the case of conflict between a requirement of the product specification or a requirement of this specification and a more stringent requirement of the purchase order, the purchase order shall prevail. The purchase order requirements shall not take precedence if they, in any way, violate the requirements of the product specification or this specification; for example, by waiving a test requirement or by making a test requirement less stringent.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The SI units are shown in brackets, except that when A480M is specified, Annex A3 shall apply for the dimensional tolerances and not the bracketed SI values in Annex A2. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.4 This specification and the applicable material specifications are expressed in both inch-pound and SI units. However, unless the order specifies the applicable “M” specification designation [SI units], the material shall be furnished in inch-pound units.  
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.

  • Technical specification
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    English language
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  • Technical specification
    26 pages
    English language
    sale 15% off