L. P. Skeen on thu 1 may 03
Whoa Jon, I didn't say STAIN, I said use Cr-Sn, period. I've never used a
stain to get red.
L
----- Original Message -----
From: "Jon Singer"
> OTOH, Lisa proposed using a Cr-Sn stain
Jon Singer on thu 1 may 03
Fa wants a transparent high-fire glossy violet/purple, and so do I; but
it seems
to be extremely difficult to achieve in high-fire glazes. Like Fa, I've
seen purple
glass, but as far as I know all of it had high lead content and melted
well below
1260 c (2300 F).
The cobalt purple that is common in magnesia matte glazes (I think
Emily's Purple
may be an example of this) is a nice grapy color, but of course it's
not transparent.
Ababi has suggested using stains. My own experience is very limited,
but I don't
think that stains generally produce transparent colors. If I'm wrong,
then this is
probably a good thing to try.
If anybody knows how to make a rich glossy transparent purple or violet
glaze
at cones 9-11 I'd love to hear about it, and I'm sure Fa would too.
Cheers, all --
jon
PS, Color Theory item: Lisa said that Red + Blue makes purple. That's
not the way
I learned color theory, and I've never managed to make it work in
practice, either.
The color theory I was taught indicates that MAGENTA + Blue makes
purple, and
that _does_ work. I just tested this again to see whether I was
remembering it
correctly; here's a Web page with a photo of the results:
http://www.jonsinger.org/glazes/purple.html
OTOH, Lisa proposed using a Cr-Sn stain, and a lot of those are closer
to magenta
than to red in any case, so there's a fair chance that mixing one with
Co might well
make purple... but will it be transparent? (The Cr-Al stains are
definitely magenta,
but they aren't soluble. I've made Cr-Al "pink" stain and put it into
glazes; they were
all milky.)
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