Lili Krakowski on mon 16 jan 06
As much as I revere Ron and John and their book, and their glazes, I =
protest blaming any clay body producers if the Mastering the Art glazes =
do not work on that manufacturer's bodies.
I am sorry, but such blaming is, well, plain ignorant. As has been said =
on Clayart and elsewhere over and over and over again, as ALL the books =
on clay and glazes explain, as endless articles expound--clay bodies and =
glazes must be adjusted to each other. And the run-of-the-mill potter =
adjusts the glazes....
Admittedly clay body producers should--and do--create clay bodies that =
work well under a large variety of glazes. And I am not going to bore =
myself and everyone else explaining the technical whys and =
wherefores--beyond saying that, among other things, it is in their =
commercial interest.
But some glazes will NOT fit on some bodies. Again this has been =
explained to a farethewell. And potters adjust or modify their glazes =
when they need to use a new body. It would not be astonishing if the =
Mastering the Art glazes work especially well on Tucker bodies, since =
Ron Roy designs Tucker's clay bodies. And Tucker bodies are great. But =
so are the clay bodies produced by a lot of other firms....
Lili Krakowski
Be of good courage
John Hesselberth on mon 16 jan 06
On Jan 16, 2006, at 11:16 AM, Lili Krakowski wrote:
> It would not be astonishing if the Mastering the Art glazes work
> especially well on Tucker bodies, since Ron Roy designs Tucker's
> clay bodies. And Tucker bodies are great. But so are the clay
> bodies produced by a lot of other firms....
Hi Lili,
You are correct as usual; however, we have found our glazes fit about
85-90% of the commercial cone 6 bodies that are available in North
America--at least according to the data we have so far. We continue
to collect data on this subject as it shows up on Clayart or when it
comes directly to us. And we checked our glazes on Tucker clays, of
course, but also on 3 of Standard Ceramics bodies. We're fairly happy
that we seem to fit as many bodies as we do. And for those having fit
problems with MC6G glazes Ron and I are always available by email to
help.
So far crazing is the most likely fit problem and we have helped a
number of people through those problems. In the few cases were
dunting or shivering were a problem we have also seen, through Ron's
dilatometer, that the body contains cristobalite. That is something
we can see no good reason for having in a cone 6 body so we usually
recommend the person find another body if cristobalite is present.
Regards,
John
Jennifer Buckner on mon 16 jan 06
At 11:16 AM 1/16/2006, Lili K. wrote:
>As much as I revere Ron and John and their book, and their glazes, I
>protest blaming any clay body producers if the Mastering the Art glazes do
>not work on that manufacturer's bodies.
>
>I am sorry, but such blaming is, well, plain ignorant. As has been said
>on Clayart and elsewhere over and over and over again, as ALL the books on
>clay and glazes explain, as endless articles expound--clay bodies and
>glazes must be adjusted to each other. And the run-of-the-mill potter
>adjusts the glazes....
Lili,
If you are referring to the recent thread about Sheffield clays, I'd like
to point out that no blame was attached to the comments about some M^6G
glazes crazing on some Sheffield clay bodies. The observations were
reported, that's all.
Jennifer
Jennifer G. Buckner jennifer@buckner.cc
Diane Palmquist on mon 16 jan 06
Hi John,
Your recipes also fit a Miller/Laguna cone six - brown and Miller/Laguna
cone 6-10 white. I have had good luck with the glazes I have tried.
Thanks!
Diane
----- Original Message -----
From: "John Hesselberth"
To:
Sent: Monday, January 16, 2006 3:06 PM
Subject: Re: Fits about glaze fit
> On Jan 16, 2006, at 11:16 AM, Lili Krakowski wrote:
>
>> It would not be astonishing if the Mastering the Art glazes work
>> especially well on Tucker bodies, since Ron Roy designs Tucker's
>> clay bodies. And Tucker bodies are great. But so are the clay
>> bodies produced by a lot of other firms....
>
> Hi Lili,
>
> You are correct as usual; however, we have found our glazes fit about
> 85-90% of the commercial cone 6 bodies that are available in North
> America--at least according to the data we have so far. We continue
> to collect data on this subject as it shows up on Clayart or when it
> comes directly to us. And we checked our glazes on Tucker clays, of
> course, but also on 3 of Standard Ceramics bodies. We're fairly happy
> that we seem to fit as many bodies as we do. And for those having fit
> problems with MC6G glazes Ron and I are always available by email to
> help.
>
> So far crazing is the most likely fit problem and we have helped a
> number of people through those problems. In the few cases were
> dunting or shivering were a problem we have also seen, through Ron's
> dilatometer, that the body contains cristobalite. That is something
> we can see no good reason for having in a cone 6 body so we usually
> recommend the person find another body if cristobalite is present.
>
> Regards,
>
> John
>
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>
Mary/Adams on mon 16 jan 06
Hey Lili, Right on! So, I'm gonna put on my Super-duper superwoman glaze
master costume and get to it!!!
I agree, we all need to test, test, test. I've had a great deal of help;
but, when it comes down to it, it takes lots of hours and work. I made up
Ron and John's glazes and wow they worked on a couple of clays; and, not so
good on others. But, I feel well ahead of the game, cuz I have a couple
that are DYNAMITE. But, it took lots of hours and testing.
No free lunch!
m
Ron Roy on tue 17 jan 06
Well - yes and no - It can be because potters do not understand the problem
- but it is also so that there are some bodies that are outside the general
expansion range of clay bodies.
We can rely on our usual glazes to tell us which bodies these are - and we
have a choice - change clays or adjust our glazes.
In some cases fixing a few glazes makes sense - in some cases it makes more
sense to change clay bodies - or make adjustments to the clay.
I think it would be a wonderful thing if clay makers would give some
indication of the expansion/contraction of their clays.
Some clay bodies have high CTE's and they can be a real problem resulting
in dunting and shivering of ware - those with to much cristobalite for
instance. I have seen those kinds of clays make life difficult for potters
and I suspect the clay makers were not even aware of the problem.
RR
>I am sorry, but such blaming is, well, plain ignorant. As has been said
>on Clayart and elsewhere over and over and over again, as ALL the books on
>clay and glazes explain, as endless articles expound--clay bodies and
>glazes must be adjusted to each other. And the run-of-the-mill potter
>adjusts the glazes....
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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