Rafael Molina-Rodriguez (Rafael Molina-Rodriguez) on sun 22 feb 98
Thought I would send this recipe Jeremy requested out to the whole
group. It's a very nice gloss black glaze. I acquired the recipe from
Dennis Olson who used this quite extensively with masking and
sandblasting which resulted in a nice high fire "black on black" surface.
Black ^ 10 reduction (from Dennis Olson)
Dolomite 300
Whiting 360
Soda Feldspar 4020
EPK Kaolin 300
Flint 1020
Cobalt Carbonate 180
Red Iron Oxide 240
Bentonite 60
Good luck!
Rafael
>>> "Jeremy" 02/10/98 08:15pm >>>
Hi, my name is Jeremy Albright. I'm a high school sophmore, and an
advanced ceramic art student, from Wisconsin. I would be greatfull if
you could send me the formula for a glaze you use called "Olson
Black".
thanks much,
jeremya@globaldialog.com
Ron Roy on mon 23 feb 98
Whith out the cobalt this would be a very durable glaze - reducing the
cobalt (it's at nearly 3% here) would make it safer for food. Keep in mind
that cobalt is a strong flux and is by far the strongest colouring oxide we
use. This glaze is gona craze on some bodies - especially porcelain.
>----------------------------Original message----------------------------
>Thought I would send this recipe Jeremy requested out to the whole
>group. It's a very nice gloss black glaze. I acquired the recipe from
>Dennis Olson who used this quite extensively with masking and
>sandblasting which resulted in a nice high fire "black on black" surface.
>
>Black ^ 10 reduction (from Dennis Olson)
>
>Dolomite 300
>Whiting 360
>Soda Feldspar 4020
>EPK Kaolin 300
>Flint 1020
>Cobalt Carbonate 180
>Red Iron Oxide 240
>Bentonite 60
>
>Good luck!
>
>Rafael
>
>
>
>>>> "Jeremy" 02/10/98 08:15pm >>>
> Hi, my name is Jeremy Albright. I'm a high school sophmore, and an
>advanced ceramic art student, from Wisconsin. I would be greatfull if
>you could send me the formula for a glaze you use called "Olson
>Black".
>
>
>thanks much,
>
>jeremya@globaldialog.com
Ron Roy
93 Pegasus trail
Scarborough Otario
Canada M1G 3N8
Phone: 416-439-2621
Fax: 416-438-7849
Web page: Home page http://digitalfire.com/education/people/ronroy.htm
nikom chimnok on wed 18 nov 98
Dear Clayarters,
I wonder if someone could help me with a glaze. This is sprayed on
thin on red clay and once-fired. With light reduction from 1000 degrees
Celsius on, then a 15 minute soak with heavy reduction at 1230 degrees, it
turns a reddish-brown. I'd like to modify it it two ways: make it mature at
1200 without using borax, and make it black in oxidation, or only moderate
reduction. The reason for this is that the clay doesn't handle very well at
1230--tends to slump.
The formula is as follows:
Soda Feldspar 52%
Calcium Carbonate 15%
lithium Carbonate 3%
Barium Carbonate 6%
Kaolin 10%
Silica 12%
Red Iron Oxide 10%
TIA
Nikom
Koratpot@loxinfo.co.th
David Hewitt on sat 21 nov 98
I would suggest that you first try increasing the silica. Do a line
blend taking the silica up to 20% in 2% steps.
If you find a satisfactory bright shiny glaze at 1200C, then turn to the
question of making it black.
Try a line blend with increasing the Red Iron Oxide from 10% to to 20%
in 2% steps. This should certainly make it blacker, but perhaps not
quite the black you want.
Pick the best and add 1% or 2% cobalt oxide.
Robin Hopper in his book 'The Ceramic Spectrum' says that a Black stain
can easilly be made with equal parts of iron, manganese, cobalt chromium
and a powdered porcelain. If no powdered porcealin is available, he
gives the following recipe:-
Iron 20
Manganese 20
Cobalt 20
Chromium 20
Kaolin 8
Feldspar 8
Flint 4
---
100
While it doesn't affect the suggestions above, I note that your recipe
without the iron oxide does not add up to 100%. Is this correct, please.
David
In message , nikom chimnok writes
>----------------------------Original message----------------------------
>Dear Clayarters,
> I wonder if someone could help me with a glaze. This is sprayed on
>thin on red clay and once-fired. With light reduction from 1000 degrees
>Celsius on, then a 15 minute soak with heavy reduction at 1230 degrees, it
>turns a reddish-brown. I'd like to modify it it two ways: make it mature at
>1200 without using borax, and make it black in oxidation, or only moderate
>reduction. The reason for this is that the clay doesn't handle very well at
>1230--tends to slump.
> The formula is as follows:
>Soda Feldspar 52%
>Calcium Carbonate 15%
>lithium Carbonate 3%
>Barium Carbonate 6%
>Kaolin 10%
>Silica 12%
>Red Iron Oxide 10%
>
>TIA
>Nikom
>Koratpot@loxinfo.co.th
>
--
David Hewitt
David Hewitt Pottery ,
7 Fairfield Road, Caerleon, Newport,
South Wales, NP6 1DQ, UK. Tel:- +44 (0) 1633 420647
FAX:- +44 (0) 870 1617274
Own Web site http://www.dhpot.demon.co.uk
IMC Web site http://digitalfire.com/education/people/hewitt.htm
SusanRaku@AOL.COM on thu 8 mar 01
In a message dated 03/07/2001 3:12:22 AM Eastern Standard Time, Cerere writes:
<< it's 6303 DEEP ORCHID AND THE GLAZE MUST CONTAIN 12-15% WHITING AND CANNOT
USE ZINC IN THE GLAZE. >>
Does anyone have a base recipe that would fit the above requirements?
Susan
Linda Touzeau on wed 26 jun 02
Does anyone have a glaze recipe for a glaze called Sardonyx?
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