Elizabeth Hewitt on fri 3 jan 03
I haven't read all responses to this.....but I think of candy making.
Two pots side by side, one cooking faster than the other, will be very
different as more moisture cooks out of the slower pot....and the candy
usually turns out much better even though they both reached the same
temperature..
Elizabeth
The best way to describe heat work is to use the analogy that I have
used many times over to explain the concept.
If you want to bake a loaf of bread and the instructions say 350 degrees
they always follow up with a given time to leave the dough in the oven.
This is "heat work". If you put the dough in the oven and the
temperature is 350 and leave it in for 2 minutes I can assure you the
dough will not be "baked". Again-heat work.... That is what the cones
are telling you but they don't just say a time, instead they say they
need so many degrees per hour of increase. This increase is ONLY
relevant to the last hour of firing. I talked to Orton just last week
and they confirmed this.
Bruce
________________________________________________________________________
______
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
Bruce Freund on fri 3 jan 03
The best way to describe heat work is to use the analogy that I have used
many times over to explain the concept.
If you want to bake a loaf of bread and the instructions say 350 degrees
they always follow up with a given time to leave the dough in the oven. This
is "heat work". If you put the dough in the oven and the temperature is 350
and leave it in for 2 minutes I can assure you the dough will not be
"baked". Again-heat work.... That is what the cones are telling you but they
don't just say a time, instead they say they need so many degrees per hour
of increase. This increase is ONLY relevant to the last hour of firing. I
talked to Orton just last week and they confirmed this.
Bruce
Steve Mills on sun 5 jan 03
Whenever we sell a kiln, no matter what controller it is fitted with, we
ALWAYS give the customer at least 5 cones for each of the temperatures
they wish to fire at, get them to watch both cones and controller, and
get them to match the controller indicated temperature to the cone
response for each program.
Controllers are very useful beasts, but they can't read heatwork like a
cone can.
At work and at home I have the best of both worlds; a controller to
manage the program, and a Kiln sitter to turn the thing off at the right
time!
Belt & Braces (Suspenders) (I love that; over here suspenders are used
by Ladies to hold their stockings up)
Steve
--
Steve Mills
Bath
UK
| |
|