Quality standard:HG/T 2775-1996
|
Item |
|
| ||
|
Best quality |
First quality |
|
| |
|
Cr2O3), content% |
99.0 |
98.0 |
99.0 |
99.0 |
|
Water content,% |
0.15 |
0.30 |
0.15 |
0.15 |
|
Content of insoluble substance in water,% |
0.1 |
0.4 |
0.2 |
0.2 |
|
PH |
6-8 |
5-8 |
No regulation |
No regulation |
|
oil absorption ,g/100g |
1.5-2.5 |
1.5-2.5 |
2.0 |
2.0 |
|
Cast |
Satisfactory |
Satisfactory |
No regulation |
No regulation |
|
Relative colouring power ,% |
Satisfactory |
Satisfactory |
No regulation |
No regulation |
|
Sieve residue ,%,45um |
0.1 |
0.3 |
0.3 |
0.5 |
|
|
- |
- |
- |
5ppm |
|
Item |
Index | |||||
|
For use of type I pigment |
For use of type H abrasive | |||||
|
Best quality |
First quality |
Qualified products |
Best quality |
First quality |
Qualified products | |
|
Chromic oxide (Cr2O3), content% |
99.0 |
98.0 |
97.0 |
99.0 |
98.0 |
97.0 |
|
Water content,% |
0.15 |
0.30 |
0.50 |
0.15 |
0.30 |
0.50 |
|
Content of insoluble substance in water,% |
0.1 |
0.4 |
0.7 |
0.2 |
0.4 |
0.7 |
|
Aqueous solution ,PH |
6-8 |
5-8 |
Irregular | |||
|
oil absorption ,g/100g |
15-25 |
20 |
25 | |||
|
Cast |
Satisfactory |
No regulation | ||||
|
Relative colouring power ,% |
Satisfactory |
No regulation | ||||
|
Sieve residue ,%,45um |
0.1 |
0.3 |
0.5 |
0.3 |
0.5 |
75um 0.5 |
|
Note:Cast standard and relative colouring power should be negotiated by manufacturers and customers. | ||||||
|
Use: |
Mainly used in the pigment of paint, glass, pottery and porcelain, porcelain enamel, cement ,used in polishing metal, producing pigment,carbuncle ,printing bank paper, also used as catalyzer of organic synthesis. |