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salt glaze look-a-likes

updated mon 27 mar 00

 

Tim E McKenna on thu 9 mar 00

Is there such a thing as a non-salt glaze fired --salt glaze --
look-a-like.

I need to make some brick (for replacement) that have a salt glaze on
them. I'm wondering if there is a way I can do this by an oxidation fire
in an electric kiln?
Any info on imitation salt glaze and what this is would be very helpful.

Thank you
Tim
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Andi Cody on fri 10 mar 00

Laguna makes an artificial salt glaze, I think both cone 6 and cone 10.
We've used the cone 6 -- very runny, all over the shelf.

At 04:03 PM 03/09/2000 EST, you wrote:
>----------------------------Original message----------------------------
>Is there such a thing as a non-salt glaze fired --salt glaze --
>look-a-like.
>
>I need to make some brick (for replacement) that have a salt glaze on
>them. I'm wondering if there is a way I can do this by an oxidation fire
>in an electric kiln?
>Any info on imitation salt glaze and what this is would be very helpful.
>
>Thank you
>Tim
>________________________________________________________________
>YOU'RE PAYING TOO MUCH FOR THE INTERNET!
>Juno now offers FREE Internet Access!
>Try it today - there's no risk! For your FREE software, visit:
>http://dl.www.juno.com/get/tagj.
>

Paul Lewing on fri 10 mar 00

Tim,
I think I might know a way to do this, but it will only work on a flat
surface. This is a technique I've been using to good effect on my tile
lately.
You need to mix up two batches of the same glaze, one with just a bit
more colorant than the other. Iron might work to simulate the color of
salt glaze, or you could maybe use a stain. Maybe make one batch with
1% iron and the other with 2%. Take the darker one, pour it out on a
table top or tiles and let it dry. Scrape it up and chop it into small
chunks, say 1/8 inch or smaller. Now glaze the brick all over with the
lighter color as you normally would, then sprinkle the chunks of darker
glaze over it. I just dump it on with a spoon and spread it around with
a pallette knife. Then just fire it normally and you should get a
light/dark textured effect that might look like salt.
Good luck,
Paul Lewing, Seattle

Cantello Studios on sat 11 mar 00

Tim

I have done this before with a Fake Ash glaze. Just spray it on thin and
fire. Any ash glaze will first pill up like salt glaze be for it begins to
run. Try Steven Hills Fake Ash.

-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.UKY.EDU]On Behalf
Of Paul Lewing
Sent: Friday, March 10, 2000 12:49 PM
To: CLAYART@LSV.UKY.EDU
Subject: Re: Salt glaze look-a-likes


----------------------------Original message----------------------------
Tim,
I think I might know a way to do this, but it will only work on a flat
surface. This is a technique I've been using to good effect on my tile
lately.
You need to mix up two batches of the same glaze, one with just a bit
more colorant than the other. Iron might work to simulate the color of
salt glaze, or you could maybe use a stain. Maybe make one batch with
1% iron and the other with 2%. Take the darker one, pour it out on a
table top or tiles and let it dry. Scrape it up and chop it into small
chunks, say 1/8 inch or smaller. Now glaze the brick all over with the
lighter color as you normally would, then sprinkle the chunks of darker
glaze over it. I just dump it on with a spoon and spread it around with
a pallette knife. Then just fire it normally and you should get a
light/dark textured effect that might look like salt.
Good luck,
Paul Lewing, Seattle

Tim E McKenna on sat 25 mar 00

Thank you Paul,

I had a real suprise with a science fair project my daughter and I are
having fun with. We decided to do a test fireing several materials to
find there melt point. Well in Robin Hopper's book "The Ceramic
Spectrum" he suggest trying different matrials. Well we used Albertson
brand luandry detergant as one of our test materials. At cone 05 it
makes a ring 1 1/2 radius and flashes off -- we thought. What really
happend is it absorbed into the clay because at cone 1and higher it
starts to boil the clay and I get that salt fire look just a little at
cone 1. (sodium is in the make up of this detergaent) At cone 9 it
looks like a volcanoe erupted around this ring. I raised the clay almost
1/4 inch and made it very foamy looking just like lava. It had a wild
effect to the clay.

I'll have to study the chemisrty to see what kind of gases are given off
and if not hamful I might play with this more.



On Fri, 10 Mar 2000 15:49:16 EST Paul Lewing
writes:
>----------------------------Original
>message----------------------------
>Tim,
>I think I might know a way to do this, but it will only work on a
>flat
>surface. This is a technique I've been using to good effect on my
>tile
>lately.
>You need to mix up two batches of the same glaze, one with just a bit
>more colorant than the other. Iron might work to simulate the color
>of
>salt glaze, or you could maybe use a stain. Maybe make one batch
>with
>1% iron and the other with 2%. Take the darker one, pour it out on a
>table top or tiles and let it dry. Scrape it up and chop it into
>small
>chunks, say 1/8 inch or smaller. Now glaze the brick all over with
>the
>lighter color as you normally would, then sprinkle the chunks of
>darker
>glaze over it. I just dump it on with a spoon and spread it around
>with
>a pallette knife. Then just fire it normally and you should get a
>light/dark textured effect that might look like salt.
>Good luck,
>Paul Lewing, Seattle

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ferenc jakab on sun 26 mar 00

When my kids were young they made some pinch pots from a fairly groggy
earthenware. I put them in our wood heater and built the fire around them
(like a pit firing) after about two hours of normal heating I threw in some
Drano (contains sodium hydroxide) and then left them to burn out over night.
Next day we removed the pieces and they had a lovely glaze somewhere between
ash and salt. Some green and some grey combined with carbon flashes on the
unglazed bits.

It was a fun experiment.
Feri.