Right now I am using groggy s/w clay.
sculptural pieces I use clay with 2 mm grog.
For wheel and hand work mostly
0,5 mm grog. For functional pieces I find it more practical to use 0,2 mm
I bisque to 950°C. This way I don't loose the shine from burnishing or
applied terra sigillata.
Use various oxides as a wash on
bisque pieces. However I mostly use manganese di-oxide.
In addition I use
slips, coloured in with oxides and stains, on green ware.
Terra sigillata I make from different colour clays.
T.S. I add stains for the more "happy" colours.
underglazes I have been using for a long time. Not exactly in the Leach
I started off with Claybright in South Africa
Now I use Botz
Unidekor in various colours.
Some time ago I switched to only buying the
white underglaze and colour them in with oxides and stains.
Claybright is now
also available in Holland.
At the moment I use a lead
based e/w transparent glaze and fire to 1085°C.
I also use a Transmutation Glaze and a variation of that glaze.
This for the more functional and decorative pieces. A transmutation glaze picks
up the oxides underneath it. This glaze over oxides or even over or under
another glazes can give very pleasing results. (See Recipes)
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