ISO 6504-3:2006 describes methods for determining the opacity (by contrast ratio measurement) given by paint films of white or light colours of tristimulus value Y greater than 25, applied at a spreading rate of 20 m2/l to a black and white chart or to colourless transparent polyester foil. In the latter case, the tristimulus value Y is measured subsequently over black and white glass panels.
ISO 6504-3:2006 describes methods for determining the opacity (by contrast ratio measurement) given by paint films of white or light colours of tristimulus value Y greater than 25, applied at a spreading rate of 20 m2/l to a black and white chart or to colourless transparent polyester foil. In the latter case, the tristimulus value Y is measured subsequently over black and white glass panels.
<p>This document specifies methods for determining the hiding power given by paint coats of white or light colours of tristimulus values <i>Y</i> and <i>Y</i><sub>10</sub> greater than 25, applied to a black and white chart, or to a colourless transparent foil. In the latter case the tristimulus values <i>Y</i> and <i>Y</i><sub>10</sub> are measured over black and white panels. Subsequently, the hiding power is calculated from these tristimulus values.</p> <p>This document also specifies a simple method for calculating the spreading rate for paints with a volatile matter content with low evaporation speed, e.g. coatings for interior walls and ceilings as specified in EN 13300.</p>
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