stonepaws on wed 31 jan 07
I'm going to mix up some stains to bring out detail on bisqued sculpture and have found references and recipes for mixing either frit 3124 or Gerstley borate with mason stains. What I haven't found though, is a comparison between the two being mixed with the stain. Before I go buy the ingredients, I'm wondering if anyone a preference between the frit or gb. The bisqued pieces are going to be white stoneware fired to ^6 oxidation. The finish will be unglazed and probably waxed. Thanks so much for any input!
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stephani stephenson on wed 31 jan 07
dear ,er, stonepaws?
both will work.
though there may be different color responses .
you don't say how much % of flux v. stain you will use
or how much water you'll add ( a thin or thick
solution)
one big difference between the two materials "in the
bucket"
is that frit sinks like a stone to the bottom of the
container, and can form a hard mass there, sooo,
you'll need to add something , bentonite, cmc, etc to
keep it in solution. or if you just mix enough for
use , you'll need to frequently stir or shake
container.
Gerstley has a nice quality in that it stays in
solution and in fact is somewhat thixotropic.. kind of
gels up in the container but when you jiggle a brush
in it liquefies again, much like a deflocculated
casting slip.
(again, depends on how much water you use)
gerstley has some soluble components so it can change
over time as water evaporates and you add more water,
but for the purpose of
fluxing stains it works fine.
it may also tint the clay differently than the frit .
...
if this is somethiing you really want to get into ,
test them both!
Stephani Stephenson
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Snail Scott on wed 31 jan 07
-----Original Message-----
>From: stonepaws
>Sent: Jan 31, 2007 2:00 PM
> I'm going to mix up some stains to bring out detail on bisqued sculpture and have found references and recipes for mixing either frit 3124 or Gerstley borate with mason stains. What I haven't found though, is a comparison between the two being mixed with the stain. Before I go buy the ingredients, I'm wondering if anyone a preference between the frit or gb.
Both these materials act as fluxes, allowing
the stain to stick to the clay when fired. GB
is preferable, because it aids in suspension,
too, while frit tends to settle out just as badly
as the stain itself. Frit is more available these
days, and if you've already got some (and
no GB, or if you are hoarding it) then add
some bentonite to the frit/stain mix.
-Snail
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