意味と目的
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. したがって, understanding the hiding power is important for coating cost and comparing coating value.

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

1.1.1 試験方法A – Contrast at a given film thickness

1.1.2 試験方法B — Film thickness with 0.98 (98%) 対比.

注記 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 “拡散率” 関数.

ASTM D6441-2016 粉体塗装隠蔽力試験

注記 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.

注記 3: A contrast ratio of 0.98 is generally accepted in the paint industry as representing “完了” 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単位までを標準とする. 括弧内の値は参考値です。.

1.5 この規格は、すべての安全問題に対処することを目的としたものではありません, もしあれば, その使用に関連する. この国際規格の使用者には、適切な安全と健康慣行を確立する責任があります。, and determine regulations limit the applicability of before use premise.