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ASTM D 6441 : 2005

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Test Methods for Measuring the Hiding Power of Powder Coatings
Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Language(s)

English

Published date

01-01-2005

CONTAINED IN VOL. 06.01, 2018 Defines and report the hiding power of a powder coating with respect to two parameters: Test Method A - Contrast Ratio at a given film thickness; Test Method B - Film thickness at 0.98 (98%) contrast ratio.

1.1 These test methods determine and report the hiding power of a powder coating with respect to two parameters:
1.1.1 Test Method A-Contrast Ratio at a given film thickness
1.1.2 Test Method B-Film thickness at 0.98 (98%) contrast ratio.

Note 1-The measured parameters conform to powder coating industry practice by measuring hiding power in relation to film thickness, rather than the more conventional "Spreading Rate" function employed in Test Methods D 344 and D 2805 and other hiding power test methods.
Note 2-Hiding power is photometrically defined as the spreading rate at 0.98 contrast ratio. See definitions of spreading rate and hiding power in Terminology D 16, D 2805, and the Paint and Coatings Testing Manual.
Note 3-The contrast ratio of 0.98 is conventionally accepted in the coatings industry as representing "complete" hiding for reflectometric hiding power measurements. But visually, as well as photometrically, it is slightly less than complete.

1.2 These test methods cover the determination of the hiding power of powder coatings applied by electrostatic spraying.

1.3 These test methods determine hiding power by means of reflectometric and thickness gage measurements. They are limited to coatings having a minimum CIE-Y reflectance of 15 %.

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 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 and health practices and determine the applicability of regulatory limitations prior to use.

Committee
D 01
DocumentType
Test Method
Pages
8
ProductNote
Reconfirmed 2005
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM D 3451 : 2006 : R2017 Standard Guide for Testing Coating Powders and Powder Coatings

CGSB 1-GP-71 : 74 AMD 13 METHODS OF TESTING PAINTS AND PIGMENTS
ASTM E 284 : 2017 : REDLINE Standard Terminology of Appearance
ASTM D 16 : 2016 : REDLINE TERMINOLOGY FOR PAINT, RELATED COATINGS, MATERIALS, AND APPLICATIONS
ASTM E 1331 : 2015 : REDLINE Standard Test Method for Reflectance Factor and Color by Spectrophotometry Using Hemispherical Geometry

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