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.