의미와 목적
5.1 the contrast under specified film thickness is useful covering power parameters of production control and purchase specification.

5.2 the covering power, the greater the per unit area the less they get sufficient to cover the required coating. 그러므로, understanding the hiding power is important for coating cost and comparing coating value.

범위
1.1 These test methods determine and report the hiding power of powder coatings based on two parameters:

1.1.1 시험방법 A – Contrast at a given film thickness

1.1.2 시험방법 B — Film thickness with 0.98 (98%) 차이.

메모 1: measuring the parameters follow the powder coatings industry practice, measurement of hiding power and the relationship between film thickness, rather than test method D344 and D2805 as well as other hiding power test methods used in “확산 속도” 기능.

ASTM D6441-2016 분말 코팅 은폐력 테스트

메모 2: covering power by spectrophotometry is defined as 0.98 under the contrast of diffusion rate. Please refer to terms D16, D2805 and the Paints and Coatings Testing Manual for definitions of spreading rate and hiding power.

메모 3: A contrast ratio of 0.98 is generally accepted in the paint industry as representing “완벽한” concealing of a reflective hiding power measurement. But visually and photologically, it is slightly incomplete.

1.2 this test method covers the through the determination of electrostatic spraying of powder coatings covering power.

1.3 these test methods through reflection and thickness gauge measurement to determine the hiding power. They are restricted to coatings with a minimum CIE-Y reflectivity of 15%.

1.4 SI 단위는 표준으로 간주됩니다.. 괄호 안의 값은 참고용입니다..

1.5 이 표준은 모든 안전 문제를 다루기 위한 것이 아닙니다., 만약에 어떠한, 그 사용과 관련된. 본 국제 표준의 사용자는 적절한 안전 및 보건 관행을 수립할 책임이 있습니다., and determine regulations limit the applicability of before use premise.