Hank Ray on sun 4 oct 98
i have been meaning to post some thoughts about underglazes at high temps for
w/the recent post regarding underglazes fired to cone 5, i thought it might be
interesting for some clayarters out there....
underglazes are usually used at cone 04 or 06 - in low fire aplications...
but, we have been using them at cone 10 reduction with very interesting
results: ...the colors change quite a bit.....
THIS IS WHAT WE DID:... we took bisqued stoneare cylinders and painted
stripes from top to bottom with various underglazes.... then we clear glazed
the bottom half of the cylinder... this enabled us to see the result of the
underglaze under a clear cone 10 glaze and at cone 10 w/out a glaze...
THE RESULTS WERE: ... many colors and effects that can be painted on bisque
for high firing and then clear glazed....and, many underglazes by themselves
produced interesting effects.. some actually looked like glossy-ish glazes and
some looking like soft pale matt glazes.... some remained their original
colors and some changed dramatically...
i had a visiting artist from czech interested in my test results... she
decided to use the underglazes on some sculptural pieces w/out an overlaze and
did some wonderful things with them.....
i haven't seen many people play with this... and some potters who don't even
know what they (underglazes) are...
pete..... just sharing...
peter coates..... city art center..oklahoma city ok.....
P.S. used them on greenware before bisque with no difference in effect...
also works well (if not better) on porcelain.........
Hank Ray on mon 5 oct 98
Something i forgot to mention is that you can paint them on freshly glazed
pots with good effects that way as well... ( shouldn't use on food contact
surfaces) you just gotta experiment.......
phyllis michele greenhouse on mon 5 oct 98
At 03:26 PM 10/4/98 EDT, you wrote:
>i have been meaning to post some thoughts about underglazes at high
>THE RESULTS WERE: ... many colors and effects that can be painted on
>for high firing and then clear glazed....and, many underglazes by
>produced interesting effects.. some actually looked like glossy-ish
>some looking like soft pale matt glazes.... some remained their
>colors and some changed dramatically...
did you happen to write down the specific underglazes that you used and
what each result was? i'd be very interested, as i'm sure many of us on
the list would be, as to which product/color produced which specific
result...i've been using velvet underglazes for years for polychrome slip
surfaces, and at the present time, i'm hand sculpting some flowers that
are being incorporated into my mosaic tile mural....i did use a variety
of the designer velvets (for the speckled affect) and fired to cone 2
(claybody vitrifies at 2) and got some fluxing out mixed with a variety
of deepend colors and also some fading :( .... no time to experiment
right now, so if you do have those results handy, i'd appreciate the
phyllis michele greenhouse
Cliff Bennett on tue 6 oct 98
Thanks for info I actually have a person renting studio space here from me and
is doing that very thing with underglazes at cone 5. there has been quite a
change as you noted with a blending of the colors sorta with the clear glaze
over them. things really look good and quite different prior to firing thanks
for the info I will pass it on.Cliff