KS ISO 6504-3:2006

Paints and varnishes - Determination of hiding power part 3 : Determination of contrast ratio of light-colouredpaints at a fixed spreading rate

describes methods for determining the opacity (by contrast ratio measurement) given by paint films of white or light colours of tristimulus value greater than 25, applied at a spreading rate of to a black and white chart or to colourless transparen