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three questions on glaze

updated wed 7 dec 05

 

marianne kuiper milks on sat 3 dec 05


H

I have some really simple questions. I hope not too dumb.

When I fire red-clay tiles, I'd fire them at about 05-ish.
I have some pieces that need to be glaze fired on 05 as well, mostly little things done by my students who come to play. (Amoco glazes, mainly)
If I biscuit the tiles lower first, can you fire biscuit and LF glaze in the same (gas) kiln? My electric kiln broke - not really a choice.
When i plan to do that, I could biscue at 06 or even 07, right (two^ different I heard once)

The other question is about mason stains.
I have dry mason stains that I want to use for a variety of projects, one to finish a water-wall for my husband's office. How do you mix the mason stains? With what? Not with water, like oxides, correct? DO you always mix oxides with water?
I seem to have read somewhere that you need to make some sort of substance and then add the dry stain material to it. I've looked in my books, but have not found a clear answer anywhere. (doesn't mean it's not there, mind you!)
All these things we have done in various workshops, but rarely dop we recei8ve good notes on that stuff, or have time to write them so they make sense later.
So it becomes another Dip-N-Do project.

My final question: do you have a simple recipe for a satin and a gloss clear to put over my tiles (03-06ish fired..don't have that down yet). I had one but it peeled off. Need it for Christmas ornaments and a tile project that has to be shipped to England.

I would appreciate your help.

Thank you, Marianne





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Paul Lewing on mon 5 dec 05


on 12/3/05 11:34 AM, marianne kuiper milks at travelartnmusic@YAHOO.COM
wrote:

> How do you mix the mason stains? With what? Not with water, like oxides,
> correct? DO you always mix oxides with water?
> I seem to have read somewhere that you need to make some sort of substance and
> then add the dry stain material to it.
As usual in ceramics, it depends. Some colors of stain are much more
refractory than other colors, and may need some flux added. Some will need
flux if used on top of a glaze, but not under. Some people add a frit or
something like Gerstley Borate if a flux is needed, others add some of the
glaze.
Depending on your application technique you may want to add something other
than flux. If you're brushing, you may want to add something like gum to
make it flow better or dry harder.
In general, water is a good place to start, and if it works OK for the
colors and techniques you're using, there's no need to use anything else.
Keep in mind that stains are made up of the same oxides as are sold
separately. They're just milled finer and mixed in combinations, usually.
You can treat them the same.
Paul Lewing, Seattle