Thwaites' Yellow

: ON THE PRIMARY, YELLOW.

Under this name chromate of cadmium was introduced some few years back.

If well prepared, it is a fine soft powder of a very vivid light yellow

colour. The compound is too soluble, however, to be of value, its

washings even with cold water being continually tinged yellow. Hence it

turns green after a time, and becomes otherwise discoloured. Like

citron yellow and other chromates apt to assume a green cast, it should

only be employed, if at all, when compounded for foliage tints, &c. This

want of durability is to be regretted, for a good sample of cadmium

chrome is marked by exceeding beauty, unsurpassed for clearness and

purity by any other yellow.



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