It is not necessary to mix paints on a palette, washing one color over another will produce better results. A tint is a color absorbed in the picture, and washing or wetting will not remove it. A surface color remains on top, and water will remove it. You can use colors stronger over the shadows. Use just what liquid you will find on the cork of the bottle, added to about one teaspoonful of water, for flesh; for draperies you can use it stronger, or as you desire.
The liquid colors are mostly used, and consist of twelve one ounce bottles, and are very powerful. Therefore, make your application very weak, a mere tint only is required. Repeat the washing or tinting until the desired shade is produced. The colors used are as follows: Black, Red, Blue, Green, Carmine, Gold, Brown, Violet, Orange, Purple and Lemon, all of which are transparent, soluble in water, and used as tinting colors. White is a surface color, and opaque.
For Flesh—Use first a weak wash or tint of gold; over this a tint of red, a little stronger for the lips.
White—This is always used last for high lights; you can make the white any tint by use of other colors.
Black—Can be used for a natural tint if toned down; valuable for all kinds of shading.
Red—Takes readily, and produces all tints from rose to scarlet; used in flesh.
Carmine—A delicate pink to magenta.
Gold—Takes readily; is a substitute for yellow; used for jewelry, flesh, blonde hair, etc.; use weak, and wash over with red for deeper results.
Brown—Takes readily; darkened by tinting over with violet or black.
Violet—Takes on touch, and is very powerful; first application very weak to insure even coloring; it makes all tints from lilac to purple, etc.