search  current discussion  categories  kilns & firing - misc 

glaze test for cone 06-6 mat glaze, oxidation

updated sat 29 may 04


Alisa Clausen on fri 28 may 04

Glaze test for cone 06-6 Mat glaze, oxidation.

Source: Clay Times
Credited to: used by Kathy Ruttenberg
often puts other glazes over it.

Firing ramp:
100c p/h to 600c (212f - 1112f)
150c p/h to 1100c (330f - 2012f)=20
100c p/h to 1220c (212f - 2228f)
5 min. soak
cool down max. to 800c
Hold 1 hour
Shut off kiln

20 Custerspar used Forshammer spar
40 EPK
30 Flint
10 Ball Clay

Note: All raw materials are measured up or down to the nearest whole =
decimal. =20
Colorants or additives to a 100 gram test batch are measured in percent =
to the 100 gram test batch.

This glaze resulted in a slip. It is dry and white and clay like. I =
can understand that is used under other glazes, because as a glaze at =
cone 6, it is not really an underfired mat, it looks like clay. It is =
50% clay. I put it over a glaze instead of under, and it bubble up like =
a slip would. It looks and behaves like a slip. Under a glaze, it will =
most likely lighten up the glaze.

Regards from Alisa in Denmark