Firing Onglaze.

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Subject

Author

Date

02-14-2007

Posted by Rosalind Lacey on February 14, 2007, 7:40 pm

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I have more or less all the info I need about mixing and applying onglaze
but little knowledge of the firing process. Oddly enough the books I have
on 'painting techniques' fail to give details of the firing and for how long
etc. They seem to assume one would automatically know this ? Someone has
said 2 to 3 hours and fast. Any advice would be much appreciated..

Posted by DKat on February 14, 2007, 8:36 pm

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>I have more or less all the info I need about mixing and applying onglaze

>but little knowledge of the firing process. Oddly enough the books I have

>on 'painting techniques' fail to give details of the firing and for how

>long etc. They seem to assume one would automatically know this ? Someone

>has said 2 to 3 hours and fast. Any advice would be much appreciated..

Wow! - well first off I will show my ignorance - what is 'onglaze'?

If I change that to being 'on glaze' then I will assume that you have left
out a lot of very critical information. How are you going to fire? That is
what kiln do you have? Before anyone can give you any useful information
they have to know what kind of clay you are using, what glaze, etc. You can
fire any where between temperatures you do in your oven (that is not really
something that anyone here will be much help with is my guess) and up to
~2500 degrees F (cone14). Many people are currently firing ~2200F (cone6).
My firing for that takes around 12 hours but that is just the glaze firing.
I fire in an electric kiln. My clay and glaze are formulated for those
temperatures. If I fired that clay to cone14 it would melt. If I fired it
in the kitchen over the glaze would not 'flux' and the clay would not
vitrify (none of the chemical changes would occur that are needed to make
the clay and glaze 'glass' like.

I've decided I have really over talked this. Tell us what it is your are
working with. The only thing I can think of that would fire in 2-3 hours is
polymer clay and that is not Pottery. DIY or HGTV might be useful for that.

Posted by Rob Morley on February 14, 2007, 9:01 pm

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dkatspam@hotmail.com says...

> >I have more or less all the info I need about mixing and applying onglaze

> >but little knowledge of the firing process. Oddly enough the books I have

> >on 'painting techniques' fail to give details of the firing and for how

> >long etc. They seem to assume one would automatically know this ? Someone

> >has said 2 to 3 hours and fast. Any advice would be much appreciated..

> >

> Wow! - well first off I will show my ignorance - what is 'onglaze'?

Google is your friend.

Posted by DKat on February 14, 2007, 11:43 pm

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> dkatspam@hotmail.com says...

>> >I have more or less all the info I need about mixing and applying

>> >onglaze

>> >but little knowledge of the firing process. Oddly enough the books I

>> >have

>> >on 'painting techniques' fail to give details of the firing and for how

>> >long etc. They seem to assume one would automatically know this ?

>> >Someone

>> >has said 2 to 3 hours and fast. Any advice would be much appreciated..

>> >

>> Wow! - well first off I will show my ignorance - what is 'onglaze'?

> Google is your friend.

Ok, that was pure laziness on my part. There really is something called
onglaze. Silly me, I assumed... well it is pretty clear what I assumed.
How does it go - assume makes an ass of u and me... (in this case forget
the u)

http://www.gocco.co.za/ceramic_transfers.htm

http://www.nehoc.com.au/info/ceramics/inks/fastbright.htm

Posted by Rob Morley on February 15, 2007, 5:35 am

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dkatspam@hotmail.com says...

> > dkatspam@hotmail.com says...

> >>

> >> >I have more or less all the info I need about mixing and applying

> >> >onglaze

> >> >but little knowledge of the firing process. Oddly enough the books I

> >> >have

> >> >on 'painting techniques' fail to give details of the firing and for how

> >> >long etc. They seem to assume one would automatically know this ?

> >> >Someone

> >> >has said 2 to 3 hours and fast. Any advice would be much appreciated..

> >> >

> >>

> >> Wow! - well first off I will show my ignorance - what is 'onglaze'?

> >>

> > Google is your friend.

> >

> Ok, that was pure laziness on my part. There really is something called

> onglaze. Silly me, I assumed... well it is pretty clear what I assumed.

> How does it go - assume makes an ass of u and me... (in this case forget

> the u)

Of course it's possible that Google (the whole Internet?) is actually
The Matrix and none of it is real ... in which case I'm screwed because
I have a lousy memory and rely on it far too much. :-)

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