Kahulugan at layunin
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. Kaya nga, understanding the hiding power is important for coating cost and comparing coating value.

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

1.1.1 Pamamaraan ng Pagsusulit A – Contrast at a given film thickness

1.1.2 Paraan ng Pagsusulit B — Film thickness with 0.98 (98%) contrast.

Tala 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 “rate ng pagkalat” function.

ASTM D6441-2016 Powder Coating Hiding Power Test

Tala 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.

Tala 3: A contrast ratio of 0.98 is generally accepted in the paint industry as representing “kumpleto na” 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 to SI units shall be deemed to be standard. Ang mga halaga na ibinigay sa mga panaklong ay para sa sanggunian lamang.

1.5 Ang pamantayang ito ay hindi nilayon upang matugunan ang lahat ng mga isyu sa kaligtasan, kung meron man, na nauugnay sa paggamit nito. Ang gumagamit ng internasyonal na pamantayang ito ay may responsibilidad na magtatag ng angkop na mga kasanayan sa kaligtasan at kalusugan, and determine regulations limit the applicability of before use premise.