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post-firing finishes

updated thu 19 feb 04

 

Vince Pitelka on tue 17 feb 04


> On that subject.......is there a different way to put a final finish on
> raku pots other than paste wax. I agree with you on the non-fired
processes
> because i want the finish to last as long as the vessel itself and not
have to
> maintain it over the years (or) have to give the buyer instructions on how
to care
> for the finish.

Brian -
I have nothing at all against post-firing finishes or effects on sculpture
or inherently non-functional pots, but I do not like the idea of ever using
post-firing finishes on functional wares. But I think terra sig is a
different matter, because there is the implication that it will not be used
for liquid foods, and waxing actually helps protect the finish. Burnished
or polished pots are often waxed to heighten the polish. I think that the
only condition here is that if you sell a polished or burnished pot that has
been waxed, you should give the buyer instructions on how to wax it
themselves.

I do not like the way paste-wax works on polished or burnished wares. For
me, it leaves a white residue in any recesses. I have had the best luck
with ordinary Lemon Pledge.

Regarding finishes to protect glazed raku pots, I have never seen any
post-firing finish that did not look artificial and plastic. It is my
opinion that there is no acceptable way to coat and protect metallic
finishes on raku, and that they simply are not appropriate for saleable
wares unless you warn the buyer that they will loose their shine over time
as the copper re-oxidizes, just as a shiny copper garden statue will turn
matt green over time.
Best wishes -
- Vince

Vince Pitelka
Appalachian Center for Craft
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
Home - vpitelka@dtccom.net
615/597-5376
Office - wpitelka@tntech.edu
615/597-6801 x111, FAX 615/597-6803
http://iweb.tntech.edu/wpitelka/
http://www.tntech.edu/craftcenter/