There are several types of red glaze, hence the confusion.  

1. In my experience, low fire reds tend to need slightly lower temps and
oxidation.  Low fire is in the cone 08 to 04 range.  If the reds are
fired together with other pieces, I would try the place that is the
coolest. This can be found by setting a few extra hidden cones around in
the kiln.  Every kiln is slightly different.

2. High fire reds are copper reduction glazes and need to be in center or
top of most gas kilns to get enough reduction.  Reduction means less
oxygen than the gas needs for a clean burn so it burns some of the
copper's oxygen and makes it turn red.  High fire is in the cone 6 to 10
range and produces stoneware and porcelain ceramics.  

3. A third kind of red can be achieved at any temperature using
commercial stains (Mason stains) combined with a small amount of clear
glaze designed for the temperature fired.  I put a layer of this
saturated colored glaze over other glazes in stoneware for accents such
as red lips on a woman's face.  Application is with a brush or sprayer.

4. A forth kind of red can be achieved with overglaze (china paint) used
in a third firing by refiring finished pieces on which overglaze is fired
at much lower temperature than the basic glaze.

Marvin Bartel

Goshen College

1700 South Main Street

Goshen IN 46526

*******************************

studio phone 574-533-0171

fax 574-535-7660

marvinpb@goshen.edu

******************************************

http://www.goshen.edu/~marvinpb/throw/cover39.html

http://www.goshen.edu/art/DeptPgs/castable.html

http://www.bartelart.com


At 08:17 AM 12/10/02 -0500, you wrote:

>Re:  "I forget.  Do I put the red glazed pots at the top or the bottom
of

>the kiln?"

>Reply: "Put them on the top shelf and leave the upper peephole open; red
needs

>lots of oxygen to come out well."

>Next reply: "bottom..keep it cool!!!"

>Next reply: "LOL!! maybe you should put them in the middle! i also
heard

>not to put them

>in the same kiln with anything green."

>

>With advice like this, no wonder I am confused. Well, I tried the top
shelf

>next to the peephole and we got a lovely shade of mushroom brown. Next
time

>we will try the bottom.

>I AM going to get this right.

>Christa

>  

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