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This recipe comes straight from the Potter's Dictionary of
Materials and Techniques. Referred to, (by me), as the Potter's
Translated in local materials it reads as
10 GS 5515 Feldspar
05 GS 5016 Kwarts
50 FR 2950 Lead
10 GS 4201 Calicium
15 GS 6504 Zinc
10 GS 5905 Titanium
Ref. numbers are from Silex.
This glaze picks up oxides from
inside the clay body and any oxides applied to the surface of the article. The
above recipe fired to 1085C has a matt finish. Can also be applied over or under
other glazes prior to firing. Results can be most pleasing. However applying the
glaze can be bit tricky as glaze tends to flake of prior to the firing if
applied wrongly. Have been told that replacing the raw zinc with calcinated zinc
alleviates this problem. Have never tried this as, over the years, I learned to
handle the glaze.
Purely by chance I discovered that giving the
unfired transmutation a coating of a clear base glaze, resulted in a shiny
After a bit of experimenting I came up with the
Transmutation glaze according to above recipe
60 Lead/Less Transparent Glaze (SG 1800)
The spectacular result in one application.
I am back to basics where I use the (matt) transmutation glaze and applying the
transparent only where I want the spectacular shiny bits.
cases flaking of the glaze during application can occur. Like when applying a
second coat when the first coat is already dry.
I always fire to
1085°C with a long soak at the end. And as a rule all glazes are applied
with a spray gun.
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