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Lithopone
Chemistry: white powder, indissoluble in water, no reaction with hydrogen sulphide and alkaline liquid. In acid solution, resolving into air hydrogen sulphide.
Application: Mainly used in paints and for making white paint and other light colour paints. Also can be employed in rubber, printing ink, varnished cloth, paper, enamel, leather and stationery. Lithopoen B-333 is a higher-class material mainly used for high-class paints and coats.
PRC National Standard GB/T1707-1995
B-301 Lithopone
| Index Name |
Value |
| Best Quality |
Grade A |
Qualified Product |
| Total zinc and barium sulfate calculated basing on zinc sulfide, % (m/m)≥ |
99 |
| Total zinc (basing on zinc sulfide), % (m/m)≥ |
28 |
| Zinc oxide , % (m/m)≤ |
0.6 |
0.8 |
1 |
| 105°C volatile, % (m/m)≤ |
0.3 |
0.3 |
0.5 |
| Soluble matter in water, % (m/m)≤ |
0.4 |
0.5 |
0.5 |
| Sieve Residue (63μm), % (m/m)≤ |
0.1 |
0.1 |
0.1 |
| Color (comparing to standard) 1] |
better |
similar |
slightly worse |
| PH value of aqueous extract 1] |
Neutral |
| Oil absorption g/100g ≤ |
14 |
| Tint-reducing power (comparing to standard)1 ], % ≥ |
105 |
100 |
95 |
| Covering force (Contrast ratio) 1] |
≥ 5% of standard (absolute difference) |
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