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cmc& slip posting

updated sat 28 aug 99

 

Wade Blocker on fri 27 aug 99

Curtis,
Sorry that my posting was not clearer. Hope I can clarify it. I use
macaloid in the following manner: I weigh out the glaze ingredients, then
add 1% of macaloid to the dry ingredients. Shake or stir it up a bit,in the
covered glaze container, I add l00 cc of water to 100 grams of the
dry mix, which is then sieved.


I find that glazes which contain a large fraction of slip eg. Albany, tend
to dust off the surface of the pot, unless mixed with CMC which allows it
to adhere tightly to the ware .

I use the CMC which has already been mixed with water and is quite
dissolved, in slip glazes only. 1 tablespoon to 100 grams of slip glaze to
which 100 cc of water has been added.

Why do I use macaloid rather than CMC in my glazes? Macaloid .holds
colorants well in suspension. I do not find that most of the glazes I use
are quite as powdery as slip glazes when applied to ware., so I do not use
CMC . Nor do I ever run out of CMC mix, nor do I have to wait for it to
dissolve when I have to make a new batch. Not the best explanation, just
the way I am used to working. I realize that macaloid is quite expensive
compared to CMC. Fortunately, I am not dependent on my pots for a living, I
use material that is labor saving, but which is not necessarily cost
effective. I remember using CMCin some glazes that turned to jelly right
then and there, do not remember what they were, but that was another reason
for not using it for everything.

Mia in ABQ