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International standards for the coating industry have been issued, and tension testing is more scientific

international standards for the coating industry have been issued, and tension testing is more scientific

May 15, 2009

[China coating information] recently, ASTM in the United States has launched two new industry standards, namely astmd74900 and astmd7233. Astmd7490 adopts the method of contact angle to measure the surface humidity of coating. Astmd7233 can more efficiently measure the quality of paint brushes

However, for special solid coatings, or some surface substrates and pigments, the humidity is an important index affecting their performance. The humidity will directly affect the cohesiveness and uniformity of the coating for Malaysia Airlines. Replace hydraulic oil gb/t 16938 (1) 997 general technical conditions for fasteners bolts, screws, studs and nuts the new international standard d7490 provides a test method for determining the surface tension of solid coatings by using the method of contact angle

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