232. DEEP AZURE BLUE
Oxide of cobalt, 1 part; oxide of zinc, 2 parts; flux No. 2, 5 parts.
The beauty of this colour depends on the proportion of flux. As
little as possible is to be used; it must, however, be brilliant.
Sometimes less is used than the proportion indicated.
233. SKY BLUE
Oxide of cobalt, 1 part; oxide of zinc, 2 parts; flux No. 2, 12 parts; pound up, melt, and pour out.
234. EMERALD GREEN
Oxide of copper, 1 part; antimonic acid, 10 parts; flux No. 1, 30 parts; pulverize together, and melt.
235. BLUEISH GREEN
Green oxide of chromium, 1 part; oxide of cobalt, 2 parts; triturate, and melt at a high heat. The product is a button slightly melted, from which is removed the portion in contact with the crucible. This button is pounded up, and three parts of flux No. 3, for one of the button, are added to it.
236. GRASS GREEN
Green oxide of chromium 1 part, flux No. 3, 3 parts, triturate and melt.