Jon Pettyjohn on fri 6 dec 96
Hi Jonathan,
on Wed. Dec.4 you wrote:
> I for one, would not spend a huge amount of money per shelf if I knew that
> with a bit o' research, there are products that perform, or out perfrom the
> expensive ones and a much more affordable price. So really, the question is
> about change, about trying new materials, and ultimately, saving some
> money.I have no vesetd interest in any of the companies that I recommended,
> nor do I care about how much money others erroneously spend. But would it
> not seem prudant that If a nitride bonded shelf is say $150 ( and I can't
> remember the exact $$) and a dry pressed cordierite composition is about
> $23 and change, and the weight, performance, etc., is the same, what makes
> better sense here?
Thanks for replying on this subject again, yes I remember you had
brought this up before, but I didn't get the implication of what you
were saying. You are telling us that the cheaper cordierite shelves
are now equal in performance to the silicon carbide. Now I have to
admit I'm a little surprised to hear this, the expensive Carborundum
shelves have always been the standard (for high fire) as long as I
can remember. I assumed before that you were comparing shelf performance
at ^6. But now I get the impression you are recommending the clay
shelves for high fire, please clarify. What I remember about cordierite
shelves is that they tend to warp rather quickly at ^9-10. Have there been
some technological advances recently that improved their performance?
thanks, Jon Pettyjohn Manila clayjon@ibm.net
anxiously hoping to pay 23$ instead of 150$ for new shelves
Jonathan Kaplan on tue 17 dec 96
>----------------------------Original message----------------------------
>Hi Jonathan,
>
>on Wed. Dec.4 you wrote:
>
>> I for one, would not spend a huge amount of money per shelf if I knew that
>> with a bit o' research, there are products that perform, or out perfrom the
>> expensive ones and a much more affordable price. So really, the question is
>> about change, about trying new materials, and ultimately, saving some
>> money.I have no vesetd interest in any of the companies that I recommended,
>> nor do I care about how much money others erroneously spend. But would it
>> not seem prudant that If a nitride bonded shelf is say $150 ( and I can't
>> remember the exact $$) and a dry pressed cordierite composition is about
>> $23 and change, and the weight, performance, etc., is the same, what makes
>> better sense here?
>
>Thanks for replying on this subject again, yes I remember you had
>brought this up before, but I didn't get the implication of what you
>were saying. You are telling us that the cheaper cordierite shelves
>are now equal in performance to the silicon carbide. Now I have to
>admit I'm a little surprised to hear this, the expensive Carborundum
>shelves have always been the standard (for high fire) as long as I
>can remember. I assumed before that you were comparing shelf performance
>at ^6. But now I get the impression you are recommending the clay
>shelves for high fire, please clarify. What I remember about cordierite
>shelves is that they tend to warp rather quickly at ^9-10. Have there been
>some technological advances recently that improved their performance?
>
>thanks, Jon Pettyjohn Manila clayjon@ibm.net
>
>anxiously hoping to pay 23$ instead of 150$ for new shelves
New codierite compositions are far beyond what used to be on the market.
These new ones are geared for high firing on quick cycles, if need be.
WHile we have all come to love and use SiC shelves in various compositions
over many years, the new cordierite compositions are made to exacting
standards for industrial use. In fact, I am awaiting delivery of new
shelves, interlocking posts, and dinnerware setters from Acme Marls, at
quite a considerable savings.
Happy Holidays.
Jonathan
Jonathan Kaplan
http://www.craftweb.com/org/jkaplan/cdg.shtml
(aka "Scooter)
jonathan@csn.net
Ceramic Design Group Ltd./Production Services Voice:
970-879-9139 POB 775112
FAXmodem: same
Steamboat Springs, Colorado 80477, USA CALL before faxing
"Arrive on time, tell the truth, be a good listener, and don't
be too attatched to the results. Above all, maintain a sense of
humor!"
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