Alisa and Claus Clausen on sun 6 aug 00
Tested on a light grey mid range stoneware, fired to cone 6 oxidation.
The original recipe is as follows:
23 EPK
20 Dolomite
38 Neph. syn.
18 Silica
4 Whiting
10 Gerstely Borate
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Described as a semi matt for cone 6 reduction. I fired it oxidation and =
either cooled the kiln too fast, resulting in only this glaze of the =
many tests, to craze. On further testing and slower cooling, I =
experienced no immediate or delayed crazing (over 14 days now since =
test). However, I have retested it with Ron Roys revison that lowers =
the expansion/contraction.
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Revised receipe for Marica Selsor's Matt.
15 Frit 3134
13 Neph Syn
14 G200 spar
24 Dolomite
32 EPk
2.0 Silica
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Substituted Frit 3134 with my local frit MOK 623, and substituted G200 =
spar for my local Forshammer spar.
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Results were clean, good, semi matt. Did not craze. =20
I dipped half a cup in the original receipe and the other half in the =
revised formula. Cannot see any difference in glazes.
Overall surface on convex surface is smooth, but there are differences =
from matt to fairly glossy, and milky and glossy where thickest. Inside =
of cup is a consistent, smooth gloss.
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Thank you Roy for the revision. I would like to add that although the =
glaze above functions fine, I am using your Satin Matt,
instead either version. Ron Roy's satin matt has an excellent hard and =
smooth surface, nice to the touch (maybe even stick free for =
casseroles?) that it suitable for many uses. I use it now as a basic =
clear, over engobes and for insides of cups and bowls. I have adopted =
it as my standard clear in the workshop.
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Best regards,
Alisa in Denmark
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PS Roy, as soon as I get some talc, I will send results of your =
revision for Cream Gloss. Thank you.
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