INDIGO.
This colour is a most valuable article, and cannot be dispensed with under any consideration. It is too well known to require describing. Though not a bright colour, it is one of the most durable, and for mixing and producing greens and purples of a permanent kind is invaluable. Neither can a good black be made without it. Care should, however, be taken to procure it of the best quality.
ULTRAMARINE.
This is a very beautiful colour, but must be used very sparingly, as it will not glaze or take any kind of polish, and is always inclined to rub off. The kinds now in general use are the French and German, the genuine article being far too high in price for this kind of work.
PRUSSIAN BLUE.
This colour has been of late almost entirely superseded by the Chinese blue, which is a much brighter colour, Prussian blue being darker and heavier looking, and is a very bad colour for glazing.
DUTCH PINK.
This is a common but very useful colour. It is a preparation of whiting and quercitron bark, and is used in making greens, no other colour answering the purpose so well. It is also very useful in mixing with chrome to produce the various shades of yellow required.
CHROME.
This is of various shades, varying from a light lemon colour to a deep orange approaching to a red. It is a useful colour; but, unless you get it genuine, it is very difficult to get it to work properly.