Tom Howard on tue 30 mar 04
Does anyone more organised than I still have the recipe for randy's red without using gerstley borate? I know it was discussed here a few years ago when the gerstley borate problems were at their height, but I have searched the archives without success, nor can I find it in my own notes. I think it was a Ron Roy formulation? I can't remember whether cadycal or a frit were substituted, or even if it was satisfactory at all. So if anyone wouldn't mind posting it or replying direct I'd be very grateful.
Frances Howard.
Wesley Derrick - Derrick Pottery - Jackson, MS on tue 30 mar 04
Try these two links....hope this helps...
Wesley
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http://www.potters.org/subject55628.htm
http://digitalfire.com/gerstleyborate/recipes/ironreds.shtml
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Ron Roy on thu 1 apr 04
Hi Frances,
I have scoured my hard drive and only came up with the original. I usually
did not keep any of those revisions I did - unless someone reported back
that they were good.
I seem to remember that my revision was good but I have no record.
Anyway I did it again - different this time - maybe better. By the way it
can't be done with Cady Cal - too much CaO.
If you try this please let me know if it works - and send me back the
recipe so I can save it - thanks!
Don't use it without the red iron as it will have too low an expansion.
Frit 3134 - 22.5
Frit 3195 - 19.0
Talc - 20.0
F4 - 5.0
EPK - 10.0
Silica - 23.5
Total - 100.0
Red iron oxide - 15.0
Looks like this is not going to do very well in a dishwasher - and you
better at least do the lemon test if you are going to use it as a liner on
functional ware.
RR
>Does anyone more organised than I still have the recipe for randy's red
>without using gerstley borate? I know it was discussed here a few years
>ago when the gerstley borate problems were at their height, but I have
>searched the archives without success, nor can I find it in my own notes.
>I think it was a Ron Roy formulation? I can't remember whether cadycal
>or a frit were substituted, or even if it was satisfactory at all. So if
>anyone wouldn't mind posting it or replying direct I'd be very grateful.
>Frances Howard.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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