ASTM D714-02 pdf free

04-10-2021 comment

ASTM D714-02 pdf free.Standard Test Method for Evaluating Degree of Blistering of Paints.
This test method employs photographic reference stan-dards to evaluate the degree of blistering that may developwhen paint systems are subjected to conditions which willcause blistering. While primarily intended for use on metal andother nonporous surfaces,this test method may be used toevaluate blisters on porous surfaces, such as wood, if the sizeof blisters falls within the scope of these reference standards.When the reference standards are used as a specification ofperformance, the permissible degree of blistering of the paintsystem shall be agreed upon by the purchaser and the seller.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use. It is theresponsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
A phenomenon peculiar to painted surfaces is theformation of blisters relative to some system weakness.Thistest method provides a standard procedure of describing thesize and density of the blisters so that comparisons of severitycan be made.
The photographic reference standards are glossy prints.Figs are reproductions of these standards and are includedto illustrate two characteristics of blistering: size and frequency.Reference standards have been selected for foursteps as to size on a numerical scale from 10 to 0, in which No.10 represents no blistering.Blistering standard No.8 representsthe smallest size blister easily seen by the unaided eye.Blistering standards Nos.6,4,and 2 represent progressivelylarger sizes.Subject the paint film to the test conditions agreed uponby the purchaser and the seller. Then evaluate the paint film forthe degree of blistering by comparison with the photographicreference standards in Figs. 1-4.Report blistering as a number (Note 2) designating thesize of the blisters and a qualitative term or symbol indicatingthe frequency.Intermediate steps in size or frequency of blisters maybe judged by interpolation.ASTM D714 pdf download.

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