Production of Coloured Finishes with White Cement:
| Colours Desired | Commercial Names of Colours | Approx. Qty necessary (kg per bag of cement) | |||||
| Light Shade | Medium Shade | ||||||
| Greys, blue-black and black | Lampblack*, or
carbon black* or black oxide of manganese* or mineral black |
0.25
0.25 0.50
0.50 |
0.50
0.50 1.0
1.0 |
||||
| Blue | Ultramarine blue | 2.30 | 4.10 | ||||
| Buff, colonial tint and yellow | Yellow ochre or
yellow oxide |
2.30
1.00 |
2.00
2.00 |
||||
| Green | Chromium oxide or
Greenish blue ultramarine |
2.30
2.70 |
4.10
– |
||||
Specifically, only the first-quality lampblack can be utilized. Carbon black is lighter in weight and needs a very exhaustive blending and mixing. Black oxide or mineral black is perhaps the most beneficial for general purposes. For black, utilize 5 kg of oxide for each bag of cement.