Francine Epstein on sun 11 nov 07
I have been getting much more uniform copper reds by reducing earlier
in the firing. cone 011 soft is when I start.
On 11/10/07, Lili Krakowski wrote:
> It is someplace in Leach's book, and Frans Wildenhain used to mention it a
> lot. We are overrefined and oversophisticated.
> For instance we add stuff to our cobalt to make it look more like the
> original cobalt whose effects we so admire on ancient pots.
> Yes cobalt costs a lot, so does everything these days, and but in the Cardew
> recipe I sent it is only a tidge under 20%.
>
> Also: SO many flush the cobalt down the drain! NO! STOP! Have one or two
> rinse jars for each color you use. When you have done your breathtaking
> brush work with the cobalt, rinse the brush and the cup etc into a rinse
> jar. Let the stuff dry and reuse.
> Use a rinse jar for the pan etc as well....When you scrape glaze off a foot,
> save it. Do not return to mother-jar but keep, dry, test.
> Save the first rinse water from your glaze pans...Again save, dry, test,
> use.
>
> As to reduction: I always have been told that NO ONE in the ancient past
> PLANNED to reduce! (Not their weight, you sillies, their kilns. Famine,
> drought, flood, disease took care of their avoirdupois!) Reduction is a
> natural byproduct of wood firing...They did not sit there and say: "Oh, wow,
> having hauled that wood off the mountain and cut and split and stacked and
> dried and lugged and heaved and like that, we now are going to waste it!"
> Reduction comes with stoking--as Mr Hendley told us this a.m.
>
> Some time ago I asked for help in testing something I had long speculated
> about. I read once that the "ancients" used blood in their glazes for
> better adhesion, and speculated that celadons may have originated there. I
> wanted someone to try it....Anyway, Ron Roy offered and turned out little
> samples that sit on my treasure shelf now.And yes: blood turned a colorless
> glaze celadon. You do not need heroics to test this. Get some chicken
> livers at the butcher's, and use the liquid...I suppose you could use the
> livers themselves if you blenderized them, but why not eat them, or feed to
> cat?
>
> And yes. I also think some gorgeous copper reds came from storing glazes in
> bronze or copper vessels. But that is for
> someone else to try.
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> Lili Krakowski
> Be of good courage
>
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