Guy Watson on thu 6 nov 03
I have 100 liters of white feldspar glaze that I don't want to trash. This
glaze will not take Cobalt Oxide painting without "spritzing" all over the
piece. After firing there is a dusting of blue arround the area i've
painted. Recently I added 2% Colmanite to the white glaze (before doing
this the white worked with the cobalt). I am guessing the Colemanite is
interacting with the cobalt. If you have experienced this I'd love to know
a way to neutralize the problem. Thanks---Guy
logan johnson on thu 6 nov 03
Hey There Guy,
I wish I could tell you how to fix your problem but since I cant maybe I can offer another alternitive. Have you tried "using" the splatters ? I know that sometimes I get so involved in "fixing" something I see as a problem , I tend to forget to think "how can I make it work for me instead of against me". Is there a way to use the splatters as a type of shading ?
or maybe a way to incorparate the splatters as part of a new design? I know these questions are obvious ones & you more than likely you have asked them your self , But, in case you haven't hope this helps. When someone asked me these questions (under different conditions) It sure helped me! ( I guess that's why I'm passing it on!)
BUNCHES OF LUCK!!
Guy Watson wrote:
I have 100 liters of white feldspar glaze that I don't want to trash. This
glaze will not take Cobalt Oxide painting without "spritzing" all over the
piece. After firing there is a dusting of blue arround the area i've
painted. Recently I added 2% Colmanite to the white glaze (before doing
this the white worked with the cobalt). I am guessing the Colemanite is
interacting with the cobalt. If you have experienced this I'd love to know
a way to neutralize the problem. Thanks---Guy
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Logan Johnson
Audeo Studios
"Carpe Argilla!!"
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Micheline Fallis on fri 7 nov 03
Hello Everyone
I have the same problem and was waiting with baited breath to see if anyone had an answer. When I first ran into it years back ,my supplier told me that it was just something that I have to live with.It was just a cobalt thing. On one of my designs I use a fine line brush to paint on pure cobalt in order to bring definition to a flower.Cobalt carbonate just does not do it. In about 8% of the pieces the cobalt sprays and the customers that like to wait for the seconds [pottery that is not good enough to sell at full price,but not bad enough to throw out] are very happy but I am not quite so overjoyed.If anyone has any solutions ,I too would be most interested!!!
Micheline Fallis
Alberta
Canada
Guy Watson wrote:
I have 100 liters of white feldspar glaze that I don't want to trash. This
glaze will not take Cobalt Oxide painting without "spritzing" all over the
piece. After firing there is a dusting of blue arround the area i've
painted. Recently I added 2% Colmanite to the white glaze (before doing
this the white worked with the cobalt). I am guessing the Colemanite is
interacting with the cobalt. If you have experienced this I'd love to know
a way to neutralize the problem. Thanks---Guy
______________________________________________________________________________
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.
Micheline
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