Katie Cordrey on tue 23 may 00
I've seen a lot of pieces with volcanic ash glazes from Mt St Helens. What I've seen has been uninteresting, a mid-range gray with little variation. I'm wondering if anyone has produced a glaze from that ash that dances with other colors.
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Virgil and Susan Leise on tue 23 may 00
Hi All, I have been watching the thread on the volcanic ash.
My uncle saved me some...from St. Maries, Idaho...
Fired at cone 10...a nice oil spot type dark brown...
But lately (cone 6) have just added 'some' to my 'junk' glaze...who knows
what that is......and it comes out a very pretty green /blue...of course it
is probly not food safe...but can be used on the outside ...OH..probly threw
in rutile too..has that look. Please don't think I do everything this
free...Ha.... doesn't everyone try to salvage everything???? *grin*
Susan (in Nebr)
Paul Lewing on tue 23 may 00
It's true that at high temperature you can get a glaze from nothing but
MSH ash and it's a speckly brown- interesting, but not flashy. I'd try
adding some bone ash to encourage the spots, maybe some tin to make the
At midrange temperatures, you need to add enough other stuff to it to
get it to melt that it comes out a speckly grey-green usually. Not
flashy and not very interesting, either.
What it's good for is a base for variegated colors. Add enough colorant
to cover the color of the base and you'll get a mottled color. To mask
the grey color, add some opacifier. I like a combination of tin oxide
and iron or titanium and cobalt. If you want to see a truly disgusting
gag-me color, add some yellow stain to that base. Trust me, I'll try
anything, and this was not one of my better efforts.
Another thing I do with the ash is add it to a glossy clear glaze, maybe
up to 20%. It makes a pale speckly grey. I use it to paint rocks and
beaches. Remember it has to be a pretty fluid glaze because the ash ios
so refractory it quickly makes that glossy glaze go matt.
Paul Lewing, Seattle
Pamala Browne on fri 2 jun 00
Hi all --been looking for this - should have remembered it by heart it is so
Blue gold gloss ^10 r
Mt. St. Helens Ash 98.50
Titanium Oxide 1.50
I came across this in an old CM . I got a beautiful blue/gold ( Ok , the
gold was a little more on the brown side but it was sparkly like gold.The
school has had this Ash for a long time and we have no idea exactly what
part of the Mt. it came from-- but it was (and still is) a colorful glaze. I
have taken to using it over heavy iron glazes on wide shoulders and it makes
really nice sparkly designs ( doesn't run much -- even after everyone said
it would.) Good Luck
I tested one batch with 9.6% Zinc and one without . The recipe
called for zinc -- I liked the one without better.
----- Original Message -----
From: Katie Cordrey
Sent: Tuesday, May 23, 2000 7:16 AM
Subject: Volcanic Ash Glazes - Anything with colors other than gray?
> I've seen a lot of pieces with volcanic ash glazes from Mt St Helens. What
I've seen has been uninteresting, a mid-range gray with little variation.
I'm wondering if anyone has produced a glaze from that ash that dances with
> Katie Cordrey
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