Leon Popik on wed 19 feb 97
How does everyone feel about Degussa stains? My facility is supposed to be
cadmium, lead free, but there are members that would like to use Degussa
stains. The stains are supposed to contain .15% cadmium and are labled as
safe if released because it is surrounded by zirconium. I would appreciate
any comments.
"Counting the days to NCECA"
John L Worner on thu 20 feb 97
They are safe when fired as long as they are not milled.
However, they must be handled carefully in their raw state.
I got a long list of warnings with the ones I ordered directly from
Cerdec. Use a proper respirator and handle with latex gloves.
Anne
Robert Speirs, M.D. 766 X4450 on thu 20 feb 97
I cannot speak about the toxicity of these stains, but I have used them
successfully for about a year as a stain and much longer in EZ strokes
by Duncan. To the best of my knowledge the DeGussa stains are the only
way to get deep reds without lead in high fire. I have always assumed
that they were safe. I use it in a slip and have gotten some great
shades from pink to Xmas red out it. I bought mine from Seattle Pottery
Supply and it was expensive, but I have made it last a long time.
If I can answer anything else, please write me back.
Laura in Oregon
Margaret Arial on thu 20 feb 97
Jeannie Otis was testing there a few years ago.Perhaps someone in the Phoenix
area has heard of her results?
Kurt Unterschuetz on fri 21 feb 97
Robert Speirs, M.D. 766 X4450 wrote:
>
> I use it in a slip and have gotten some great
> shades from pink to Xmas red out it.
Hi Laura in Oregon,
I am just starting to get interested in slips but not quite sure how to
approach it.
I fire to cone 5-6 in oxidation, using a white stoneware with no grog in
it. What does a slip recipe consist of? Is it a glaze, just thicker?
Do I apply it on wet ware?
Any hints would be very helpful. TIA
Kurt Unterschuetz
SchatziBoyz Pottery
Marengo, IL USA
ps I bought a raku kiln from Seattle Pottery Last year and love it :)
Karen Gringhuis on fri 21 feb 97
Leon - Qn - where did you get the phrase "safe if released." I don't
think that's in the mfgr's lit which I have. Without the lit in hand
what comes to mind is "thermally & chemically stable" i.e. doesn't burn out at h
I have worked with these stains & had them PROFESSIONALLY tested in my
glazes for release. NO DETECTABLE RELEASE - fired to C/10. Refer to my article
If I can help further, please let me know. Do you need mfgr's address, etc.?
Karen Gringhuis
Sam Tomich on fri 21 feb 97
Laura wrote:
to get deep reds without lead in high fire. I have always
assumed
> that they were safe. I use it in a slip and have gotten some great
> shades from pink to Xmas red out it.
What exactly do you do and how high do you fire? What slip? Sam in
Hawaii
Dannon Rhudy on sat 22 feb 97
----------------------------Original
I am just starting to get interested in slips but not quite sure
how to
approach it.
What does a slip recipe consist of? Is it a glaze, just thicker?
----------------------------
Kurt,
A slip is not a glaze made thicker. It is a CLAY(body), made
thinner. It may or may not have oxides/coloring agents in it.
There are such things as slip glazes, (glaze slips??).
There was a recent article
in CM, within the year, I think, re: slip glazes.
Dannon Rhudy
potter@koyote.com
Ric Swenson on sun 23 feb 97
>----------------------------Original message----------------------------
>----------------------------Original
>I am just starting to get interested in slips but not quite sure
>how to
>approach it.
> What does a slip recipe consist of? Is it a glaze, just thicker?
>----------------------------
>
>Kurt,
>
>A slip is not a glaze made thicker. It is a CLAY(body), made
>thinner. It may or may not have oxides/coloring agents in it.
>
>There are such things as slip glazes, (glaze slips??).
>There was a recent article
>in CM, within the year, I think, re: slip glazes.
>
>Dannon Rhudy
>potter@koyote.com
___________reply-----------------
Read any F. Carlton Ball book. Glenn C. Nelson also talks intelligently
about slips glazes. Albany slip is a naturally occuring clay found on the
banks of the Hudson near Albany , NY and it is a beautiful glaze....shiney
glassy surface at cone 10. There are many such natually occurring "slip
glazes" found around river banks. Anchorage has a "Glacial Till" clay in
the Cook Inlet which fires to a nice deep brown color at cone ten. It is a
nice low fire terracotta type clay which makes nice pots at cone 06. Your
area probably has some sort of "clay slip" available....check with the
local geologists...they know.
Hope this helps.
Ric Swenson, Bennington, Vt
Kim Marie on tue 20 mar 01
This question comes because the stains are so expensive and I don't want =
to goof up. =20
when I use Mason stains I usually add 4-6% of the stain to the base =
glaze. Would I use the same percentage with the Degussa reds or are =
they more concentrated?
thanks!!
Kim
kmarie@odyssey.net
PAGCarr@AOL.COM on wed 21 mar 01
Kim,
I use 8% Degussa bordeaux red in my base slip glaze (translucent) to achieve
a nice intense red. If your glaze is opaque, the % may change to affect the
desired intensity. I also use Mason stains, and find that the percentage
required varies with each stain. I don't really find Degussa stains more
concentrated than Mason stains, but they do give me a color I can't get
otherwise. So, I usually make up small (50-200g) quantities to test a
variety a percentages and stain mixtures... often trying a line blend.
Hope this helps!
Paulette Carr
St. Louis
lucien m koonce on wed 21 mar 01
Who is a distributor for Degussa stains? Highwater Clays, here in NC, does
not have them listed in their catalog. Thanks........................Lucien
Koonce
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Click on http://lmkoonce.home.mindspring.com and visit my on-line gallery.
L M Koonce / Robbins, NC, USA
-----Original Message-----
From: PAGCarr@AOL.COM
To: CLAYART@LSV.CERAMICS.ORG
Date: Wednesday, March 21, 2001 6:39 AM
Subject: Degussa Stains
>Kim,
>
>I use 8% Degussa bordeaux red in my base slip glaze (translucent) to
achieve
>a nice intense red. If your glaze is opaque, the % may change to affect
the
>desired intensity. I also use Mason stains, and find that the percentage
>required varies with each stain. I don't really find Degussa stains more
>concentrated than Mason stains, but they do give me a color I can't get
>otherwise. So, I usually make up small (50-200g) quantities to test a
>variety a percentages and stain mixtures... often trying a line blend.
>Hope this helps!
>
>Paulette Carr
>St. Louis
>
>___________________________________________________________________________
___
>Send postings to clayart@lsv.ceramics.org
>
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
Wade Blocker on wed 21 mar 01
Lucien,
New Mexico Clay carries Degussa pigments. Also Laguna, and US Pigment
Corp. Mia in ABQ
Veena Raghavan on wed 21 mar 01
Message text written by Ceramic Arts Discussion List
>
Who is a distributor for Degussa stains?<
Hi Lucien,
I cannot get at my catalogs, as everything is packed and stacked,
while my studio floor is being redone. But, from what I remember, Axner or
Ceramic Supply of New York and New Jersey carries Degussa.
Good luck.
Veena
Veena Raghavan
75124.2520@compuserve.com
| |
|
