The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California
Coloring Finishing And Painting Wood
22. Preparation of Pigment Oil-Stains.—The various pigments ground in oil which are obtainable on the market are not all equally permanent when exposed to light. If one has the three primary colors—red, yellow, and blue —and black, nearly any desired tone or hue can be secured if he knows how to mix colors. The following are among the most permanent of the colors that are ground in oil:
| PIGMENTS PERMANENT IN LIGHT | |
| Ivory Black | Light Red |
| Vandyke Brown | Madder Lake Red |
| Burnt Ochre | Burnt Sienna |
| Yellow Ochre | Raw Sienna |
| French Yellow Ochre | Burnt Umber |
| Venetian Red | Raw Umber |
| Indian Red | Ultramarine |
The above colors are not all equal in chroma or brilliance of hue, some of them being weak in coloring power. A pigment which is low in chroma must be used in a greater amount than is the case where the color is strong and brilliant. On account of the variations in strength of various colors the amount by weight that is required to produce desired tones also varies. The following formula is suggestive of the approximate composition of a pigment oil stain for use on the trim or woodwork of a house or in staining furniture:
To each gallon:
| 70 per cent raw linseed-oil 20 per cent turpentine 10 per cent Japan drier 1 to 21-; pounds of pigment-colors finely ground in oil |
A stain with such a large per cent of raw linseed-oil dries rather slowly even with a drier to quicken the oxidation process. A much quicker drying stain can be made by using boiled instead of raw linseed-oil. The following formula makes a rather quick-drying stain that is somewhat thinner than the above mixture and will penetrate deeper into the wood:
To each gallon:
| 1 part bailed linseed-oil 2 parts turpentine 1 to 21/2 pounds of pigment-colon ground in oil |
