I really have no idea who the Randy is! The Randy's Red has been around for quite some time. I HAVE NEVER been able to duplicate the ones that actually look like a rich brick breaking red. I spent 2 years trying!
On Randy's Red - I believe the glaze originally was published in Reader's Digest Crafts and Hobbies (1981) under the name Ketchup Red. Whenever someone tweaked it at all (used a different feldspar, pumped up an ingredient by 1%, etc.) they added their name. It is very sensitive to which ingredients are used so when we had to change our talc the glaze went a flat ugly brown. I added 2% bone ash and got it back. It needs a slow cool down for the RIO to do its thing. If you are getting a pretty red inside a bowl or cup and blah on the outside then that is your problem (slow down the cooling).
Nadine Mercader
Roxanne,
I really have no idea who the Randy is! The Randy's Red has been around for quite some time. I HAVE NEVER been able to duplicate the ones that actually look like a rich brick breaking red. I spent 2 years trying!
Jun 29, 2012
Donna Kat
On Randy's Red - I believe the glaze originally was published in Reader's Digest Crafts and Hobbies (1981) under the name Ketchup Red. Whenever someone tweaked it at all (used a different feldspar, pumped up an ingredient by 1%, etc.) they added their name. It is very sensitive to which ingredients are used so when we had to change our talc the glaze went a flat ugly brown. I added 2% bone ash and got it back. It needs a slow cool down for the RIO to do its thing. If you are getting a pretty red inside a bowl or cup and blah on the outside then that is your problem (slow down the cooling).
Jun 30, 2012
Donna Kat
The Black Stain posted in Glaze and Clay comes from this article
http://www.ceramicartdaily.net/booksales/Electric_Busch.pdf
which is a cone 6 electric firing. I would only be guessing the range but I would think it fairly broad.
Jun 30, 2012