ASTM D823-18

Standard Practices for Producing Films of Uniform Thickness of Paint, Coatings and Related Products on Test Panels

SIGNIFICANCE AND USE
4.1 This practice should be used for those coatings that are designed for spray applications of objects in the factory or in the field. It is particularly important that it be used in the evaluation of metallic coatings for appearance properties, such as gloss and color.  
4.2 Coatings applied by this test method may exhibit a slight orange-peel or spray wave.
SCOPE
1.1 Five practices are given for preparing films of uniform thickness of coatings on test panels. These practices are:
Practice A—Automated Spray Machine Application
Practice B—Motor-Driven Dip Coater Application
Practice C—Motor-Driven Blade Film Application
Practice D—Hand-Held Spray Gun Application
Practice E—Hand-Held Blade Film Application  
1.2 The use of wire-wound drawdown bars as described in Practice D4147 may also be an appropriate method for producing films of uniform coating thickness.  
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
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: 28-Feb-2018
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.23 - Physical Properties of Applied Paint Films

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D823 − 18
Standard Practices for
Producing Films of Uniform Thickness of Paint, Coatings
1
and Related Products on Test Panels
This standard is issued under the fixed designation D823; 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 Related Coating Products
D1005 Test Method for Measurement of Dry-Film Thick-
1.1 Five practices are given for preparing films of uniform
ness of Organic Coatings Using Micrometers
thickness of coatings on test panels. These practices are:
D1212 Test Methods for Measurement of Wet Film Thick-
Practice A—Automated Spray Machine Application
ness of Organic Coatings
Practice B—Motor-Driven Dip Coater Application
D3924 Specification for Standard Environment for Condi-
Practice C—Motor-Driven Blade Film Application
tioning and Testing Paint, Varnish, Lacquer, and Related
Practice D—Hand-Held Spray Gun Application
3
Materials (Withdrawn 2016)
Practice E—Hand-Held Blade Film Application
D4147 Practice for Applying Coil Coatings Using Wire-
1.2 The use of wire-wound drawdown bars as described in
Wound Drawdown Bars
Practice D4147 may also be an appropriate method for
D4285 Test Method for Indicating Oil or Water in Com-
producing films of uniform coating thickness.
pressed Air
1.3 The values stated in SI units are to be regarded as the D4414 Practice for Measurement of Wet Film Thickness by
Notch Gages
standard. The values given in parentheses are for information
only. D7091 Practice for Nondestructive Measurement of Dry
Film Thickness of Nonmagnetic Coatings Applied to
1.4 This standard does not purport to address all of the
Ferrous Metals and Nonmagnetic, Nonconductive Coat-
safety concerns, if any, associated with its use. It is the
ings Applied to Non-Ferrous Metals
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
PRACTICE A—AUTOMATED SPRAY MACHINE
mine the applicability of regulatory limitations prior to use.
APPLICATION
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3. Summary of Practices
ization established in the Decision on Principles for the
3.1 A liquid material is applied to a test panel by means of
Development of International Standards, Guides and Recom-
anautomatedspraymachineconsistingofamountedspraygun
mendations issued by the World Trade Organization Technical
and a panel holder. This machine can (1) move the panel
Barriers to Trade (TBT) Committee.
holder, with test panel, at a uniform speed through the
atomized spray produced by a fixed spray gun, or (2)itcan
2. Referenced Documents
move the gun, with atomized spray, at a uniform speed past the
2
2.1 ASTM Standards:
test panel(s) mounted on a fixed panel holder. A machine
D609 Practice for Preparation of Cold-Rolled Steel Panels
equipped with a programmable system can index the spray gun
for Testing Paint, Varnish, Conversion Coatings, and
vertically for multiple passes and for multiple coats with
selective time delay.
1
3.2 The thickness of coating applied is controlled by the
These practices are under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, and Applications and are the direct responsibility
traverse speed of the panel or gun, the fluid delivery rate of the
of Subcommittee D01.23 on Physical Properties of Applied Paint Films.
gun,thesprayguntipsize,theviscosityofthematerial,andthe
Current edition approved March 1, 2018. Published March 2018. Originally
amount of nonvolatile matter in the material.
approved in 1945. Last previous edition approved in 2017 as D823 – 17. DOI:
10.1520/D0823-18.
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 The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D823 − 18
4. Significance and Use 7. Procedure
4.1 This practice should be used for those coatings that are 7.1 If compressed air is used to atomize the coating, verify
designed for spray applications of objects in the factory or in
that the air is clean and dry according to Test Method D4285.
the field. It is particularly important that
...

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: D823 − 17 D823 − 18
Standard Practices for
Producing Films of Uniform Thickness of Paint,
1
Varnish,Coatings and Related Products on Test Panels
This standard is issued under the fixed designation D823; 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
1.1 Five practices are given for preparing films of uniform thickness of coatings on test panels. These practices are:
Practice A—AutomaticA—Automated Spray Machine Application
Practice B—Motor-Driven Dip Coater Application
Practice C—Motor-Driven Blade Film Application
Practice D—Hand-Held Spray Gun Application
Practice E—Hand-Held Blade Film Application
1.2 The use of wire-wound drawdown bars as described in Practice D4147 may also be an appropriate method for producing
films of uniform coating thickness.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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:
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)
D1212 Test Methods for Measurement of Wet Film Thickness of Organic Coatings
D1400 Test Method for Nondestructive Measurement of Dry Film Thickness of Nonconductive Coatings Applied to a
3
Nonferrous Metal Base (Withdrawn 2006)
D3924 Specification for Standard Environment for Conditioning and Testing Paint, Varnish, Lacquer, and Related Materials
3
(Withdrawn 2016)
D4147 Practice for Applying Coil Coatings Using Wire-Wound Drawdown Bars
D4285 Test Method for Indicating Oil or Water in Compressed Air
D4414 Practice for Measurement of Wet Film Thickness by Notch Gages
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
1
These practices are under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and are the direct responsibility of
Subcommittee D01.23 on Physical Properties of Applied Paint Films.
Current edition approved Dec. 1, 2017March 1, 2018. Published December 2017March 2018. Originally approved in 1945. Last previous edition approved in 20122017
ε1
as D823 – 95 (2012)D823 – 17. . DOI: 10.1520/D0823-17.10.1520/D0823-18.
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
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D823 − 18
PRACTICE A—AUTOMATICA—AUTOMATED SPRAY MACHINE APPLICATION
3. Summary of Practices
3.1 A liquid material is applied to a test panel by means of an automaticautomated spray machine consisting of a mounted spray
gun and a panel holder. This machine can (1) move the panel holder, with test panel, at a uniform speed through the atomized spray
produced by a fixed spray gun, or (2) it can move the gun, with atomized spray, at a uniform speed past the test panelpanel(s)
mounted on a fixed panel holder. A machine equipped wit
...