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.