Ron Roy on sun 10 sep 06
Hi Brad,
OK - so now you understand - the expansion of that glaze is way low - If
you asked me if you should use it I would say no - not in it's present
form.
Bring it to the workshop and I will use it as a demo if you like - I'll
raise the expansion and sub in 3134 for the GB.
It's really not hard to do once you have learned to use a glaze calculator.
I noticed that some one said that doing calculations by hand was just as
good as using a computer. Strictly speaking I guess I have to agree but it
is very discouraging and takes a lot longer.
You have to guess what amount to raise or lower by - hand calculate - then
see if it was the right amount. Probably not - so do it again - and so on.
I leaned in art school - there were no calculators then - I used a slide
rule - never got the same answer twice - drove me crazy.
With a calculator you can increase or decrease the amount of any material
10 times in a minute and the answer will be there almost as fast and the
ratio and expansion will also be calculated.
You can see where I'm going with this - with a computer program that
calculated your changes - there is no limit to the number of changes you
can make and have them calculated as you make them - this is the sort of
thing computers were made for - if you are interested in being able to
adjust your glazes - and apply some specific changes based on the role of
the oxides in clays and glazes - get a calculator.
RR
>Ron,
>
>Yes, the first glaze only totals 89. In fact, in the original ClayArt
>string of messages on this glaze, one sender noted this and questioned if
>something might be missing.
>
>I may be attending your class at Mother Earth Clay--have not signed up yet.
>If so, I'll bring samples of these glaze tests to show.
>
>Brad Carter
>Grass Valley, Calif
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
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