NEN-EN-ISO 787-16
General methods of tests for pigments and extenders - Part 16: Determination of relative tinting strength (or equivalent colouring value) and colour on reduction of coloured pigments - Visual comparison method
| Organization: | NEN |
| Publication Date: | 1 September 1995 |
| Status: | active |
| Page Count: | 18 |
| ICS Code (Pigments and extenders): | 87.060.10 |
scope:
The complete procedure consists of four parts: determination of the conditions for the preparation of the dispersion of the coloured pigment, and determination of the ratio of the coloured pigment to white pigment; preparation ot the dispersion of the coloured pigment under defined conditions on an automatic muller; mixing the dispersions of coloured pigment and white pigment in a known ratio with a white pigment paste; the strength and undertone of the resulting reduction paste are compared with those of a similar paste made under the same conditions from the agreed reference pigment and the same white pigment paste.
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