David Hendley on fri 26 may 00
My college professor in the '70's (John Brough Miller) was
Maija Grotell's student at Cranbrook. We even had a Globar
kiln. It was amazing in that it probably weighed 2 tons and
cost thousands of dollars, yet had a stacking space of no
more than 15 cu. ft.
The 'leopard spot' effect was one of John's favorite glaze
tricks, and, I, of course picked it up.
In those days we used Albany Slip, but I've recently used
my Albany Slip substitute black glaze,and it also works.
My Redart clay based Albany Slip substitute has been posted
on Clayart, but here it is again:
Redart clay 72
whiting 10
Kona F-4 feldspar 8
EPK kaolin 5
talc 5
I've always fired at cone 10 reduction, and found that
just about any stiff glaze will work for this effect. Matt
glazes work better than glossy glazes. Of course I also
never brushed the glazes; just poured and dipped like
usual.
'Mamo', if it's the same one I've seen through the years,
should be a good glaze for the top coat.
--
David Hendley
Maydelle, Texas
hendley@tyler.net
http://www.farmpots.com/
----- Original Message -----
From: Gregory D Lamont
To:
Sent: Wednesday, May 24, 2000 4:01 PM
Subject: Re: Bristol glaze?
I've been reading up on Maija Grotell, a potter who emigrated from Norway
| to this country back in 1925, studied with C. F. Binns at Alfred, and
| taught ceramics at Cranbrook Academy for many years. She had a method of
| glazing, described in the book, whereby she first brushed on a layer of
| Albany slip, then brushed on a white Bristol glaze over that. Apparently,
| a characteristic of Bristol-type glazes is that they are very stiff. The
| fluid Albany slip would boil up through the top layer of glaze creating a
| "leopard spot" effect. She fired to cone 8 in an Alpine "Globar"
| (electric) kiln and cooled very slowly, allowing the surface to smooth
out.
|
| I will be experimenting with this technique for a class assignment, and
| will be trying some of my own "stiff" glazes in addition to a zinc-base
| "Bristol" glaze. My instructor suggested I also try a glaze we have
called
| Mamo--a nice matte glaze. Ideally, I'd like to get the effect to work at
| cone 6.
|
| Greg
|
| E-mail address:
| gdlamont@isunet.net
|
| |
|
