ASTM D6762-18

Standard Test Method for Determining the Hiding Power of Paint by Visual Evaluation of Spray Applied Coatings

SIGNIFICANCE AND USE
5.1 This test method determines hiding power of a test paint by visual evaluation of a spray applied coating.
Note 1: Test Method D2805 describes an instrumental method for determining hiding power. The paint film is applied at a uniform thickness (for example with a doctor blade), the film thickness is measured rigorously, and the opacity is determined photometrically. Hiding power is thereby determined with a high degree of precision.  
5.2 Test Method D6762 is less precise than Test Method D2805, but is commonly used since it is more closely related to the application characteristics of the paint and is simpler in concept and evaluation.
SCOPE
1.1 This test method provides for the quantitative visual determination of the film thickness required to achieve full hiding. This film thickness is considered to be the hiding power of a test paint.  
1.2 This method applies only to spray applied coatings but its concepts are valid for other methods of application as well.  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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.

General Information

• Status: Historical
• Publication Date: 31-Aug-2018
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.26 - Optical Properties

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D6762 − 18
Standard Test Method for
Determining the Hiding Power of Paint by Visual Evaluation
1
of Spray Applied Coatings
This standard is issued under the fixed designation D6762; 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.
1. Scope D1729 Practice for Visual Appraisal of Colors and Color
Differences of Diffusely-Illuminated Opaque Materials
1.1 This test method provides for the quantitative visual
D1730 Practices for Preparation of Aluminum and
determination of the film thickness required to achieve full
Aluminum-Alloy Surfaces for Painting
hiding. This film thickness is considered to be the hiding power
D2805 Test Method for Hiding Power of Paints by Reflec-
of a test paint.
tometry
1.2 This method applies only to spray applied coatings but
D7091 Practice for Nondestructive Measurement of Dry
its concepts are valid for other methods of application as well.
Film Thickness of Nonmagnetic Coatings Applied to
Ferrous Metals and Nonmagnetic, Nonconductive Coat-
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical ings Applied to Non-Ferrous Metals
E691 Practice for Conducting an Interlaboratory Study to
conversions to SI units that are provided for information only
and are not considered standard. Determine the Precision of a Test Method
1.4 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Definitions—For definitions of terms used in this test
responsibility of the user of this standard to establish appro-
method, refer to Terminology D16 and the Paint/Coatings
priate safety, health, and environmental practices and deter-
3
Dictionary.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
4. Summary of Test Method
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4.1 The test paint is applied by means of spray application
Development of International Standards, Guides and Recom-
in a wedge-shaped film over a black and white, black and gray
mendations issued by the World Trade Organization Technical
or red and gray pattern so that a thickness variation is obtained,
Barriers to Trade (TBT) Committee.
which provides excess hiding at one end of the pattern and
partial hiding at the other end of the pattern.
2. Referenced Documents
4.2 The dry film is examined under standard illumination to
2
2.1 ASTM Standards:
select the point where the pattern just becomes obscured. The
D16 Terminology for Paint, Related Coatings, Materials, and
thickness of the film at this point is designated the hiding
Applications
power of the paint.
D609 Practice for Preparation of Cold-Rolled Steel Panels
for Testing Paint, Varnish, Conversion Coatings, and
5. Significance and Use
Related Coating Products
5.1 This test method determines hiding power of a test paint
D1005 Test Method for Measurement of Dry-Film Thick-
by visual evaluation of a spray applied coating.
ness of Organic Coatings Using Micrometers
NOTE 1—Test Method D2805 describes an instrumental method for
determining hiding power. The paint film is applied at a uniform thickness
(for example with a doctor blade), the film thickness is measured
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
rigorously, and the opacity is determined photometrically. Hiding power is
and Related Coatings, Materials, and Applications and is the direct responsibility of
thereby determined with a high degree of precision.
Subcommittee D01.26 on Optical Properties.
Current edition approved Sept. 1, 2018. Published September 2018. Originally
5.2 Test Method D6762 is less precise than Test Method
approved in 2002. Last previous edition approved in 2017 as D6762 – 02a (2017).
D2805, but is commonly used since it is more closely related
DOI: 10.1520/D6762-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Published by the Federation of Societies for Coatings Technology, 492
the ASTM website. Norristown Rd., Blue Bell, PA 19422.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6762 − 18
to the application characteristics of the paint and is simpler in
concept and
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6762 − 02a (Reapproved 2017) D6762 − 18
Standard Test Method for
Determining the Hiding Power of Paint by Visual Evaluation
1
of Spray Applied Coatings
This standard is issued under the fixed designation D6762; 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.
1. Scope
1.1 This test method provides for the quantitative visual determination of the film thickness required to achieve full hiding. This
film thickness is considered to be the hiding power of a test paint.
1.2 This method applies only to spray applied coatings but its concepts are valid for other methods of application as well.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D16 Terminology for Paint, Related Coatings, Materials, and Applications
D609 Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related Coating
Products
D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
D1186 Test Methods for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to a Ferrous
3
Base (Withdrawn 2006)
D1400 Test Method for Nondestructive Measurement of Dry Film Thickness of Nonconductive Coatings Applied to a
3
Nonferrous Metal Base (Withdrawn 2006)
D1729 Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials
D1730 Practices for Preparation of Aluminum and Aluminum-Alloy Surfaces for Painting
D2805 Test Method for Hiding Power of Paints by Reflectometry
D7091 Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals
and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3
3.1 Definitions—For definitions of terms used in this test method, refer to Terminology D16 and the Paint/Coatings Dictionary.
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.26 on Optical Properties.
Current edition approved Dec. 1, 2017Sept. 1, 2018. Published December 2017September 2018. Originally approved in 2002. Last previous edition approved in 20092017
ɛ
as D6762 – 02a (2009)(2017). . DOI: 10.1520/D6762-02AR17.10.1520/D6762-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Published by the Federation of Societies for Coatings Technology, 492 Norristown Rd., Blue Bell, PA 19422.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6762 − 18
4. Summary of Test Method
4.1 The test paint is applied by means of spray application in a wedge-shaped film over a black and white, black and gray or
red and gray pattern so that a thickness variation is obtained, which provides excess hiding at one end of the pattern and partial
hiding at the other end of the pattern.
4.2 The dry film is examined under standard illumination to select the point where the pattern just becomes obscured. The
thickness of the film at this point is designated the hiding power of the paint.
5. Significance and Us
...