Donna Kat on fri 27 oct 06
Has anyone tried using the MC6 glazes on greenware? I realize this is
highly unlikely but thought I would ask. Donna
John Hesselberth on fri 27 oct 06
On Oct 27, 2006, at 7:56 PM, Donna Kat wrote:
> Has anyone tried using the MC6 glazes on greenware? I realize this is
> highly unlikely but thought I would ask. Donna
>
>
Hi Donna,
I know a number of people have tried it but I haven't gotten much
feedback from them. One the important features for a glaze used in
single firing is that it have plenty of clay in it. As you know,
several of our glazes do and I would start with them. Ones like
Glossy Base 1 and 2 and their color variants that have 20 and 17% EPK
respectively. The high calcium semimattes should do well also--their
clay content is even higher. I would steer away from the zinc base,
which has only 10% clay, for single firing.
Remember that single firing takes extra care both in glaze
application and in firing. Your loses may be quite high until you
develop the skill and techniques to do it well. While some potters do
it regularly and have done so successfully for years, others never
get the hang of it and decide bisque firing suits them better.
Good luck,
John
Donna Kat on sat 28 oct 06
Thank you both! I must say, I was pleasantly surprised and I should not
have been. With my sense of time, it seems that the MC6 book just came
out but even that should not have mattered.
By nature and upbringing I am fugal and impatient. I have always been
intrigued with glazing greenware and since I want to develop my own glazes
right now it seems this is the time to also see if glazing greenware works
for me.
One of the posts I read on glazing greenware talked of glazing and then
trimming. While I love the idea of the clean glaze line this would give,
I then think of the clay that would have to be thrown away=85 I wonder if it=
could be turned into a slip?
Donna
iglasgo on sat 28 oct 06
I have used Raspberry on greenware successfully. Haven't tried the
other MC6G glazes on greenware yet. I like Raspberry because it seems
to be less dependent on the firing schedule for its outcome, so I can
throw it in with a kiln fill of other glazes and lazy/fast-fire to my
heart's content.
-Ivy G.
--- In clayart@yahoogroups.com, John Hesselberth wrote:
>
> On Oct 27, 2006, at 7:56 PM, Donna Kat wrote:
>
> > Has anyone tried using the MC6 glazes on greenware? I realize this is
> > highly unlikely but thought I would ask. Donna
> >
> >
>
> Hi Donna,
>
> I know a number of people have tried it but I haven't gotten much
> feedback from them. One the important features for a glaze used in
> single firing is that it have plenty of clay in it. As you know,
> several of our glazes do and I would start with them. Ones like
> Glossy Base 1 and 2 and their color variants that have 20 and 17% EPK
> respectively. The high calcium semimattes should do well also--their
> clay content is even higher. I would steer away from the zinc base,
> which has only 10% clay, for single firing.
>
> Remember that single firing takes extra care both in glaze
> application and in firing. Your loses may be quite high until you
> develop the skill and techniques to do it well. While some potters do
> it regularly and have done so successfully for years, others never
> get the hang of it and decide bisque firing suits them better.
>
> Good luck,
>
> John
>
Ron Roy on sat 28 oct 06
I think the subbing in of a ball clay for kaolin in a glaze will help in
this - if anyone whats to do some testing I'll be happy to revise some
glazes with ball instead of kaolin - I need to know what kind of ball clay
you have.
RR
>I have used Raspberry on greenware successfully. Haven't tried the
>other MC6G glazes on greenware yet. I like Raspberry because it seems
>to be less dependent on the firing schedule for its outcome, so I can
>throw it in with a kiln fill of other glazes and lazy/fast-fire to my
>heart's content.
>-Ivy G.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Snail Scott on sun 29 oct 06
At 09:49 AM 10/28/2006 -0400, Donna wrote:
>One of the posts I read on glazing greenware talked of glazing and then
>trimming. While I love the idea of the clean glaze line this would give,
>I then think of the clay that would have to be thrown away=85 I wonder if=
it
>could be turned into a slip?
That would be a ready-made engobe, but=20
since the proportions of clay to glaze=20
would vary with each trim job, it would=20
be best to do a whole lot of trimming
(maybe separating each glaze-color trim=20
into separate bins), then mix up the result=20
and test it. The test would be valid for=20
just that lot, but if you had enough,=20
you could use it for a while. Of course,=20
it will have a lot more clay than glaze,=20
so the differences might be miniscule and=20
irrelevant to an engobe - they're not too=20
fussy.=20
The colorant load in a glaze is generally=20
far less than that needed to produce a
noticeable color in clay, so it will=20
probably result in an engobe that varies=20
only slightly from the base clay. Of=20
course, you could doctor it if you like.
-Snail
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