1867 Six Hundred Receipts by John Marquart

600 MISCELLANEOUS VALUABLE RECEIPTS.

118

sometimes called plain oclire, and the latter spruce ochre. It will grind very fine, resists the weather well, and bears a good body. Massicot is a good light yellow for general use, and very serviceable, mixed with blue, for making greens. Chrome Yelloio is a very rich and brilliant yellow, and employed to advantage in house and coach painting. Turner's^ or Patent, Yellow. — It is a very beautiful colour, much in use among coach-painters. Orpiment. — It is good for some purposes, particu- larly for the production of straw-colour in painting doors, windows, &c. It likewise, in common with all bodies that contain arsenic, produces a bad effect on any metallic substance exposed to its action. Naples Yellow. — The best of all yellows. It is milder and more unctuous than either orpiment, massicot, or any of the ochres. It is necessary to use it with great care. It must be ground well on a slab of porphyry or marble, and scraped together with an ivory knife, as both stone and steel have a tendency to turn it to green. Yellow of Antimony. — It holds an intermediate place between chrome yellow and J^aples yellow. It is. chiefly used for giving a yellow colour to glass and earthenware. Yellow Pink. — It grinds and dissolves in water easily ; but care must be taken not to bring it in con- tact v;ith iron, as the astringent principle which it contains in abundance instantly dissolves that metal, which in its turn destroys the clearneas of the colour. Prussian Blae.—"Y\\QYQ are blue colours superior to this, both in clearness and durability, but none 2A