Alisa Clausen on wed 27 feb 08
Glaze test for RR Fat White ^6 ox., colorants
Fired on mid fire white stoneware
Firing ramp with an electric controller is:
100c p/h to 600c (212f - 1112f)
150c p/h to 1140c (302f - 2084f)
80c p/h to 1220c (176f - 2228f)
15 min. soak
cool down max. to 900c (1652f)
Hold 30 minutes
Shut off kiln
Colorants or additives to a 100 gram batch are measured in percent to the
100 gram batch.
Standard Substitutions in all tests:
Local Boron Frit is used for Frit 3134
Forshammer (a half and half Potash and Soda spar) is the only Feldspar used
Local Boron Frit is used for Gerstley Borate
All substitutions are done not by Mol. Wts., but gram for gram.
Recipe Name: Fat White Ron Roy rev.
Cone: 6 Color:
Firing: Surface: Waxy silk mat
5 Frit--Ferro 3134
Base glaze is waxy, covering, white glaze
Smooth surface, slight crystals and opalescence where thickest.
Overall golden yellow
Overall yellow tan ground with pinkish white fur where thickest.
Overall tan ground with whitish fur where thickest
Light tan ground and pinkish where thickest
May Luk on thu 28 feb 08
So much work! Thanks for the effort.
This glaze makes RR look fat?
I am interested in a FAT white glaze. Have you done much test on white glazes? I have now a glossy tin white and a satin white. I would love to have a fat white like a leaded maiolica lardy glaze. I know it's hard to get above cone 6 (and without lead). If you come across one, please let me know.