色漆和清漆 遮盖力的测定 第2部分:黑白格板法
Paints and varnishes-Determination of hiding power-Part 2: Method of black and white grid panel
Paints and varnishes-Determination of hiding power-Part 2: Method of black and white grid panel
Paints and varnishes-Determination of hiding powerPart 1;Determination of contrast ratio of white and light coloured paints