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chun recipe

updated mon 16 oct 06

 

Craig Martell on sun 15 oct 06


Janine asked:

> Do you have any recipes you'd be willing to share?

Hi:

Sure, here's a good one that I've used. This is one of my formulations so
if you don't like it you can blame me. 8>)

Chun #29 Cone 10 Reduction

Soda Feldspar 35.38
Apple Ash 23.58
Grolleg Kaolin 4.79
Silica 36.25

add Macaloid 2.0%

I use either Kona F-4 or Unispar 50 for the soda feldspar. You can try any
woodash you have and it will most likely work. Fruitwood ash is a good
choice because of the higher Phosphorous content. If your ash is low in
P2O5 you could add a percent or two of bone ash or tri calcium phosphate.

This glaze is very nice on porcelain over iron slips and cobalt/iron
slips. You can also add small amounts of black iron oxide for color. My
woodash has some iron so I don't need to add anything. The glaze needs a
thick application to develop the chun blue.

regards, Craig Martell Hopewell, Oregon