Young's Demonstrative Translation of Scientific Secrets / Or, A Collection of Above 500 Useful Receipts on a Variety of Subjects

by Daniel Young

227. No. 2 FLUX

Of No. 1, 8 parts; fused borax, in powder, 1 part. This mixture is melted.

228. No. 3 FLUX

Fused borax, 5 parts; calcined flint, 3 parts; pure minium, 1 part. This mixture is also melted. The above fluxes are used in procuring the different colours for staining glass.

229. INDIGO BLUE

Oxide of cobalt, 1 part; flux No. 3, 2 parts.

230. TURQUOISE BLUE

Oxide of cobalt, 1 part; oxide of zinc, 3 or 4 parts; flux No. 3, 6 parts; melt and pour out. If it is not sufficiently green, increase the zinc and flux.

231. AZURE BLUE

Oxide of cobalt, 1 part; oxide of zinc, 2 parts; flux No. 2, 8 parts; melt them together.