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fw: saffire blue recipe

updated fri 8 sep 00

 

Arnolds Home Improvements on thu 7 sep 00


-----Original Message-----
From: Arnolds Home Improvements
To: clay art
Date: Thursday, September 07, 2000 6:53 PM
Subject: saffire blue recipe


>Thanks to all who have responded so far. As I said I am new to pottery and
>to the clay art list, so I will make some mistakes at both until I learn,
>but I will learn! Because I am a 50 year old building contractor that has
>fallen in love with clay.
>I understand now if you have a question about a recipe post it.(duh on my
>part) so here is the one I use.
>epk 26
>frit3134 43
>custer feldspar 26
>silica 15
>rutile 4
>cobalt oxide 2
>
>I ran one test with the glaze thick it came out a cloudy blue, next test I
>thinned the glaze until it would pass the dry finger test, this is when I
>get the green. I tried double dipping some pots with the glaze thinnned. I
>had to grind kiln shelves the next day! (by the way I own a dremmel and an
>angle grinder, the angle grinder works best)
>I screen my glaze twice with a100 mesh screen.
>If I add more cobalt will this be food safe?
>I do not know the iron content of my clay, I use standards #153
>Again I would like to thank all who responded at least I don't feel so all
>alone now.
>If I need to post more information please let me know . I think this will
>be a beautiful glaze if all the bugs get worked out.
>
>Gene Arnold
>mudduck@advi.net
>
P.S. I forgot to say I fire to cone 6 oxidation with a15 min. hold or soak
at cone 6.