PAINTS AND VARNISHES - DETERMINATION
OF HIDING POWER - PART D6:
DETERMINATION OF CONTRAST RATIO OF
LIGHT-COLOURED PAINTS AT A FIXED
SPREADING RATE
(FIRST REVISION)
(ISO 6504-3:2006, MOD)
This part of ISO 6504 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 transparent polyester foil. In the latter case, the tristimulus value is
measured subsequently over black and white glass panels
