iandol on sat 29 apr 00
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Subject: Sharing glaze information =3Ccone0=3C Glazes
Martin Howard suggests
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Perhaps the truth just is that there are very few on ClayArt who fire at =
02-2.
The main lot of glaze examples are 6-10, the high fire range,... but it is
wasteful of heat, energy and materials.
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I know that, if a search were made, he would find several hundred recipes =
which
mature below the Cone 6 level. Their sources are often mentioned on Clayart.=
I
know at least one author who defines Cone 04-4 as Soft Stoneware and gives
eleven pages of recipes for Cone 02-2.
Perhaps the basic question needs to be rephrased. Ask instead, What are the
advantages of that specific cone value as a point at which you will get a =
mature
glaze on a mature body with satisfactory decoration?
If it were only a question of economy or conservation, it would be possible =
to
develop glazes to fit clay formulations to mature down at cone 022. Only =
time
and experimentation would say if they would be durable, aesthetically =
acceptable
and so on. Perhaps the time, cost and physical effort of exploring other =
heat
ranges would negate any savings which might accrue from using lower maturing
temperatures.
In the end, a potter or ceramic designer defines what will satisfy and
manufactures to those objectives. Customer satisfaction, personal =
satisfaction
are achieved. If a person chooses to go outside current fields of operation =
they
are welcome to put in the hard yards. Do the research, build the kiln, make =
the
mixtures, fire the tests, record and evaluate the results, promote the =
product
then calculate the extent of the savings. You are exploring a strange place
where others have never ventured. Do not expect to find sign posts to show =
the
way forward to success.
Ivor Lewis. Mystified by how little water may be needed to plasticise =
Kaolin.
And looking forward to going to cone 10 plus to achieve optical colours.
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