Tom Buck on thu 26 apr 01
MerrieB:
You do what works. a pyrometric cone is better than a pyrometer
reading because the cone measures "heat-work", which correlates to how
mature the body will be after the firing. But as Tony Hansen notes in his
Magic of Fire II book, a pyro cone doesn't always reproduce the same heat
-work (placement, etc.). Hansen uses "Bulmer rings" to double check the
heat-work (aka "pull rings").
Having said all that, a practical approach is to get to know your
kiln and note what cones do at what temp reading. Then, you can rely on
temp reading (with cones in place as back-up) as the signal to power down=
=2E
This in effect is what happens when you use an electronic kiln controller=
=2E
bye for now. peace. tom b.
Tom Buck ) tel: 905-389-2339
(westend Lake Ontario, province of Ontario, Canada).
mailing address: 373 East 43rd Street,
Hamilton ON L8T 3E1 Canada
Marianne Lombardo on thu 26 apr 01
Tom;
Would you mind explaining a bit further to us what Bulmer rings are and h=
ow
they work?
Marianne Lombardo
Omemee, Ontario, Canada
email: mlombardo@nexicom.net
----- Original Message -----
From: "Tom Buck"
To:
Sent: Thursday, April 26, 2001 5:37 PM
Subject: Cone & Temperature
> MerrieB:
> You do what works. a pyrometric cone is better than a pyrometer
> reading because the cone measures "heat-work", which correlates to how
> mature the body will be after the firing. But as Tony Hansen notes in h=
is
> Magic of Fire II book, a pyro cone doesn't always reproduce the same he=
at
> -work (placement, etc.). Hansen uses "Bulmer rings" to double check the
> heat-work (aka "pull rings").
> Having said all that, a practical approach is to get to know yo=
ur
> kiln and note what cones do at what temp reading. Then, you can rely on
> temp reading (with cones in place as back-up) as the signal to power do=
wn.
> This in effect is what happens when you use an electronic kiln controll=
er.
> bye for now. peace. tom b.
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