Ron Roy on sat 1 nov 97
Just in case - anyone who tries this glaze - there is a good possibility
this glaze will break ware - it has a low expansion and may present fit
problems with many clay bodies. It is also oversupplied with boron which
makes it a "soft" glaze - likely to leach and perhaps discolour. I
recommend you test for both fit and durability before committing to it.
>----------------------------Original message----------------------------
>here is a clear glaze that i got years ago from ceramic monthly. i found it in
>an article by dorothy haffner. it is a ^5 - 7 oxidation. it works very well
>over underglazes. it has never crazed over porcelain, but i have never tried
>it over stoneware.
>Gerstley borate........50 gms
>EPK............................17.5 gms
>Flint............................32.5gms
>i use it very thinly on bisqued ware.
Ron Roy
93 Pegasus Trail
Scarborough,Canada
M1G 3N8
Evenings, call 416 439 2621
Fax, 416 438 7849
Studio: 416-752-7862.
Email ronroy@astral.magic.ca
Home page http://digitalfire.com/education/people/ronroy.htm
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