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ASTM D 6279 Document Information:
Title
Standard Test Method for Rub Abrasion Mar Resistance of High Gloss Coatings
ASTM International
Publication Date:
Oct 1, 2003
Scope:
This test method covers procedures for evaluating the relative
mar resistance of a series of high gloss coatings applied to a
flat, rigid surface. Wet rub and dry rub abrasion tests are
described. To fully characterize a coating's mar resistance, both
tests should be run.
NOTE 1—Dry abrasion mar resistance can also be evaluated by
using Test Methods D 6037. If a series of very highly mar resistant
coatings is being evaluated, Test Methods D 6037 will generally
provide the better performance discrimination than the dry rub test
described here. However, if the equipment described in Test Methods
D 6037 is not available, the dry rub test described in this test
method affords a reasonable alternative. The dry rub test is also
useful for evaluating coatings that are not highly mar
resistant.
Mar resistance is assessed by measuring the gloss of the abraded
and unabraded areas. Mar resistance is directly related to the
coating's ability to retain gloss in abraded areas.
NOTE 2—The mar resistance values obtained by this test method
have no absolute significance. They should only be used to derive
relative performance rankings for test panels that have been
prepared from the series of coatings that are currently being
evaluated. If mar resistance values are quoted between
laboratories, it is essential that a common standard be measured
and that the values be compared to that standard. Even then, the
values should be used with caution.
The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
only.
This standard does not purport to address 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.
Keywords:
- abrasion
- aluminum
- coatings
- gloss
- grit
- mar
- powder
- rub test
- scratch
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