This may be grayed by the addition of a little green.
A walnut stain may be had by adding a little Venetian red to asphaltum, thinned with turpentine or benzine.
_Aniline oil stains._ Advantages: the colors are clear and easily obtainable.

Disadvantages: the colors are likely to be crude and too bright, and unless great care is taken the tones are metallic and not soft enough to suit wood.

It is necessary to purchase colors soluble in oil.

These can be had of William Zinnser and Company, 197 William Street, New York.

Four colors are necessary to get the desired shades, Bismarck brown, dark yellow, dark blue, and black.