INDICES DENOMINATION
|
NORM RO GRADES |
Color |
Y-0 |
Y-1 |
Y-2 |
a) Instrumental method of evaluation – total color difference ΔE, max. |
6 |
6 |
6 |
b) visual method of evaluation |
Within tolerances for paste colors, approved samples for each grade |
Iron compound in terms of Fe2O3,% by wt, min. |
86 |
85 |
84 |
Water soluble substances, % by wt, max. |
0.3 |
0.5 |
0.8 |
Volatiles, % by wt, max. |
0.5 |
1.0 |
1.5 |
pH of water suspension |
4.5-7.0 |
4.0-7.0 |
4.0-7.0 |
Oil absorption, g/100g of pigment, max. |
30-50 |
35-60 |
35-60 |
Coverage potential, g/m2, max. |
15 |
20 |
20 |
Relative tinting strength, % by wt., min. |
100 |
95 |
95 |
Dispersibility during 30 minutes, mkm, max. |
20 |
25 |
25 |
Wet sieving residue on screen 0063 mesh, %, max. |
0.08 |
0.20 |
0.30 |
Dry sieving residue on screen 016 mesh, %, max. |
0.05 |
0.05 |
Not read |
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