ASTM D714-02(2017)

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.
Designation: D714 − 02 (Reapproved 2017)
Standard Test Method for
Evaluating Degree of Blistering of Paints
This standard is issued under the fixed designation D714; 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 4. Reference Standards
1.1 This test method employs photographic reference stan- 4.1 The photographic reference standards are glossy
dards to evaluate the degree of blistering that may develop prints. Figs. 1-4 are reproductions of these standards and are
when paint systems are subjected to conditions which will included to illustrate two characteristics of blistering: size and
cause blistering.While primarily intended for use on metal and frequency.
other nonporous surfaces, this test method may be used to
4.2 Size—Reference standards have been selected for four
evaluate blisters on porous surfaces, such as wood, if the size
steps as to size on a numerical scale from 10 to 0, in which No.
of blisters falls within the scope of these reference standards.
10representsnoblistering.BlisteringstandardNo.8represents
When the reference standards are used as a specification of
the smallest size blister easily seen by the unaided eye.
performance, the permissible degree of blistering of the paint
Blistering standards Nos. 6, 4, and 2 represent progressively
system shall be agreed upon by the purchaser and the seller.
larger sizes.
1.2 This standard does not purport to address all of the
4.3 Frequency—Reference standards have been selected for
safety concerns, if any, associated with its use. It is the
four steps in frequency at each step in size, designated as
responsibility of the user of this standard to establish appro-
follows:
priate safety, health, and environmental practices and deter-
Dense, D,
mine the applicability of regulatory limitations prior to use.
Medium dense, MD,
1.3 This international standard was developed in accor-
Medium, M, and
Few, F.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
NOTE1—Aquantitativephysicaldescriptionofblisteringwouldinclude
Development of International Standards, Guides and Recom- the following characteristics determined by actual count:
Size distribution in terms of mensuration units,
mendations issued by the World Trade Organization Technical
Frequency of occurrence per unit area,
Barriers to Trade (TBT) Committee.
Pattern of distribution over the surface, and
Shape of blister
2. Referenced Documents
For the usual tests, an actual count is more elaborate than is necessary.
2.1 ASTM Adjuncts:
5. Procedure
Reference Standards for Blistering of Paint Coatings
5.1 Subject the paint film to the test conditions agreed upon
by the purchaser and the seller.Then evaluate the paint film for
3. Significance and Use
the degree of blistering by comparison with the photographic
3.1 A phenomenon peculiar to painted surfaces is the
reference standards in Figs. 1-4.
formation of blisters relative to some system weakness. This
test method provides a standard procedure of describing the
6. Report
size and density of the blisters so that comparisons of severity
6.1 Report blistering as a number (Note 2) designating the
can be made.
size of the blisters and
...