Лаки и краски. Метод сравнения коэффициента контрастности (укрывистости) красок одного типа и цвета
Название (англ.):
Paints and varnishes; Comparison of contrast ratio (hiding power) of paints of the same type and colour
Описание (англ.):
Specifies the standard method to be used in comparing the contrast ratios given by paint films of white or ligth colours, of refelctance factor greater than 40 %, dried at normal air temperature and applied at approximately equal wet film thickness to black and white substrates. The wet film thickness selected, approximately 50 um,corresponds to a spreading rate of approximately 20 m2/l. Because different operators using the same film coating device obtain films differing in thickness the method is not satisfactory as an absolute method for the determination of hiding power.