jonathan kaplan on mon 7 nov 11
Thanks RIchard, for bringing up some very important issues with glazes.
While deflocculation of casting slips is a major use of these products, =3D
glaze rheology is also a very overlooked subject and can benefit hugely =3D
from the use of such materials.
It's just not as simple a procedure as mixing so much dry glaze material =
=3D
with so much water to achieve the correct dispersion of solute in =3D
solution/solvent. Glazes also have their own specific gravity, their own =
=3D
viscosity, and their own poise, to name just a few characteristics.
There is a recent article in CM by David Pier on glaze additives that is =
=3D
very important. Glazes that we purchase already mixed in a bottle have =3D
many additives and also have very a specific rheology.=3D20
It seems to me that by understanding not only glaze additives but what =3D
we can do to make our glaze application better, we would have better =3D
success with the finished work. I remember a former instructor after =3D
mixing up a very large batch of glaze, immersing his hand, removing it, =3D
and using the sheeting action as the glaze flowed from his hand to =3D
demonstrate when the glaze is best. Useful, maybe, but hardly a =3D
quantitative measurement. While I am sure that there are many using this =
=3D
method, it is not a viable measurement of glaze rheology.
Respectfully
Jonathan
Jonathan Kaplan
curator
Plinth Gallery
3520 Brighton Blvd
Denver, CO 80216
www.plinthgallery.com
303 295-0717 =3D20
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