ASTM D 6441 : 2005 : R2016
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Standard Test Methods for Measuring the Hiding Power of Powder Coatings
Hardcopy , PDF
27-02-2024
English
11-04-2016
Important note : Users cannot be edited or removed once added to your Multi user PDF.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.
| Committee |
D 01
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| DocumentType |
Test Method
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| Pages |
8
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| ProductNote |
Reconfirmed 2016
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| PublisherName |
American Society for Testing and Materials
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
1.1These test methods determine and report the hiding power of a powder coating with respect to two parameters:
1.1.1Test Method A—Contrast Ratio at a given film thickness
1.1.2Test Method B—Film thickness at 0.98 (98 %) contrast ratio.
Note 1:The measured parameters follow powder coating industry practice by measuring hiding power in relation to film thickness, rather than the “Spreading Rate” function employed in Test Methods D344 and D2805 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 D16, D2805, and the Paint and Coatings Testing Manual.
Note 3:The contrast ratio 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.
1.2These test methods cover the determination of the hiding power of powder coatings applied by electrostatic spraying.
1.3These 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 %.
1.4The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5This 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 to determine in advance the applicability of regulatory limitations prior to use.
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