Nancy Braches on mon 18 sep 06
Good advice :) ... my calculator sits by my side when I figure my glazes (new territory for me). Also I purchased an inexpensive electric postal scale that works great...was about $40 vs the over $100 for them in clay catalogs.
BTW The Jennies Purple that I found in the archives is a nice glaze at cone 6. I had a misfire in my kiln which went well beyond cone 7 (since the cone 7 was flat as a pancake to the kiln shelf) so I know it went beyong cone 8. The color was an awesome sea blue. I don't know if it's stable at that temperature, maybe some more experienced glaze masters would know...but it truly is a beautiful glaze when fired higher.
Nancy
Hilltop Pottery
mel jacobson wrote: one hint.
use pounds.
i do.
i convert all of my standard recipes/formula to pounds.
here is how.
west high math, 1953.
grams, let us say 1600 grams.
X .0022= 3.52 pounds.
round that to 3 and half pounds.
use a cute little hand held calculator...save your
pencil lead.
if you are fussy about 12 grams.
don't convert it...just measure 12 grams.
so, you use both methods.
it is like my rhodes 32
11 pounds of feldspar
5.5 pounds china
5.5 dolomite
.5 pounds whiting.
some silica. to taste.
some rutile/iron to taste.
i use an old store/ portable scale. tare the container.
i have never been able to tell one way or the other
if i have 16 grams of feldspar toooo much.
who cares.
?
mel
at the high school, years back...volcanic ash was in a 60 pound
bag, gertsley was 40...mmm, i wonder why i chose a 60/40 mix.
dump the bags in a 50 gallon drum...add water.
stir. make life easy. can you imagine weighing out 100 pounds
with a gram scale...and then worry about it?
from: mel/minnetonka.mn.usa
website: http://www.visi.com/~melpots/
Clayart page link: http://www.visi.com/~melpots/clayart.html
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