Thursday, November 19, 2009

Looking for a cone 6 reduction White

This is a cone 10 MgO White that I love, but I'd like to find a cone 6 white that might give me similar results. This is the cone 10 recipe:

MgO White Satin

F4 40
Whiting 8
Talc 16
Dolomite 14
EPK 22
Silica 5
Tin Oxide 4
Zircopax 8
Bentonite 2

I've tested this in cone 6 and it doesn't work. Is it worth trying to change this to a cone 6 (Val Cushing's handbook has a small section on this), or does anyone have a nice cone 6 White for reduction?


John Britt said...


First of all that recipe has both zircopax 8% and tin 4 % which may be excessive.

Also it has 22% EPK and then 2 bentoite. You probably don't need the bentonite for suspension as there is plenty of clay.

I would just try some new recipes:

Buttery Rust Cone 6
41.0 Nepheline Syenite
20.0 Silica
7.0 Dolomite
5.0 EPK
15.0 Gerstley Borate
15 Talc

10.0 Tin Oxide

I would try this and leave out the tin and see if you like it and then go from there.

Let me know if you need more,

John Britt said...

Here is a glaze from Vantuil Varges:

Calcium Satin at Cone 6 - L&V series

39.00 Custer Feldspar
13.20 EPKaolin
20.20 Whiting
27.60 Silica