CNW on wed 2 feb 00
Sorry I seem to be in a very talkie mood today, must be because I have so
much that I SHOULD be doing. Anyway, as was noted not long ago some of the
cones are nearly the same temperature such as 01, 1 and 2 (I think). Do they
measure heatwork differently even though the melting point may be nearly the
same? Or can someone tell me what the reason is? Just curious and avoiding
work.
Celia in NC
cwike@conninc.com
GSM_ENT on thu 3 feb 00
Hi Celia:
This is a great question for Tim Fredrick from Orton Firing Institute. He is
a veteran potter and has all the Foundation assets at his disposal to
provide the expert answer, after all that is the Orton Foundation Charter,
no?
Tony
----- Original Message -----
From: CNW
To:
Sent: Wednesday, February 02, 2000 2:06 PM
Subject: Cones and more cones
> ----------------------------Original message----------------------------
> Sorry I seem to be in a very talkie mood today, must be because I have so
> much that I SHOULD be doing. Anyway, as was noted not long ago some of the
> cones are nearly the same temperature such as 01, 1 and 2 (I think). Do
they
> measure heatwork differently even though the melting point may be nearly
the
> same? Or can someone tell me what the reason is? Just curious and avoiding
> work.
>
> Celia in NC
> cwike@conninc.com
Frederich, Tim on fri 4 feb 00
Celia,
At a normal 108 degree F heating rate the equivalent end point of
cone 01 is 2046 F. The equivalent end point of cone 1 is 2079 F. This is a
difference of 33 F. Cone 1 and cone 2 are only 9 degrees F apart. Heatwork
which is a combination of time and temperature applies to all of the cones.
Each cone should react to a specific amount of heat and time even though
there may only be a few degrees between them.
Consistency of use remains as one of the most important ways to use
and interpret the cones. Heating rates and hold times will also play a role
in determining the heatwork that is accomplished. Cones bend in a repeatable
manner because of their carefully controlled compositions. For this reason
they are an accurate guage for your firing profile.
If you have questions, please ask.
Sincerely,
Tim Frederich, Orton Ceramic Foundation
> ----------
> From: CNW[SMTP:cwike@conninc.com]
> Sent: Wednesday, February 02, 2000 5:06 PM
> To: CLAYART@LSV.UKY.EDU
> Subject: Cones and more cones
>
> ----------------------------Original message----------------------------
> Sorry I seem to be in a very talkie mood today, must be because I have so
> much that I SHOULD be doing. Anyway, as was noted not long ago some of the
> cones are nearly the same temperature such as 01, 1 and 2 (I think). Do
> they
> measure heatwork differently even though the melting point may be nearly
> the
> same? Or can someone tell me what the reason is? Just curious and avoiding
> work.
>
> Celia in NC
> cwike@conninc.com
>
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