And in addition there are other pigments which artists may wish to try. For deep brown, sepia, umber, sienna, etc. are used and generally with good results. These pigments may be mixed and used on prints without decreasing their value. Someone told me in India that good yellow might be obtained from a cow after feeding her with mango-tree leaves. I have not been able to obtain such colour.
Constant care is necessary in trying to get rid of any blemish from the colours used.
Whenever any undesirable symptoms are discovered, I have always tried to find the real cause by suitable experiments so as to avoid the repetition of these failures. Paste P aste is made from rice flour. When cooked it finally turns translucent, but just before it turns entirely translucent, while there still remain some whitish parts, it should be taken off the fire. That is the stage in which the starch paste is the strongest. When it becomes too thick it can be diluted with water to a suitable consistency just before using.