Lili Krakowski on thu 22 mar 07
Oh dear.
Ok. Specific gravity measurements are nifty BUT help only
once the glaze is finalized. In other words they help when you have
established that this glaze has to be that thick to work right.
So.
1. It seems to me that c.08 bisque for a c.6 body low. No wonder the bisque
sucks the glaze water up. I would try an .04 bisque.
2. Your glaze is made up of unplastic materials known to dash to the bottom
of the bucket, where they clunk. I would start by adding 2% -3% bentonite
and some calcium chloride (the latter drop by drop). Many people use
magnesium sulfate (Epsom Salts) but I cannot tell you in what quantity. The
point of this exercise is to achieve a nicely suspended, creamy glaze.
3.I rarely use CMC. As far as I know it is used to harden a glaze surface
to facilitate working on that surface--as in applying decoration.
4. My consistent recommendation is: make a mix of about 2 parts silica to 1
part clay. Mix well (wearing your mask of course)
Then dilute the mix to the consistency of melted icecream , or heavy cream,
or homemade ranch dressing, or beaten up yoghurt or...well,. never mind.
PRACTICE the pouring bit with this cheap mix. PRACTICE till it is
second-nature. About 30 tries should do it...
Lili Krakowski
Be of good courage
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