Christopher Anton on tue 3 oct 00
According to the table I just found in Bailey's current catalog, there is a
temperature difference between Orton's large and small cones. The
difference is minimal (just a few degrees) within the same heating rate, but
can be about 100 degrees off with strong heating rate (degrees per hour
increase) variation.
Someone mentioned that proximity to the peep holes in a smaller kiln might
make a difference. I think that the temperature chart for Orton cones
confirms this!
- Chris
Snail Scott on tue 3 oct 00
At 08:49 AM 10/3/00 -0500, you wrote:
>Someone mentioned that proximity to the peep holes in a smaller kiln might
>make a difference. I think that the temperature chart for Orton cones
>confirms this!
Another thing which might make your visual cones drop
later than they should: badly fitting peephole plugs.
(And don't be checking them every 5 minutes; you let
in a cold draft when you do, and 'freeze' the little
suckers!) Also, check the angle of the cones in their
pack - the bottoms are molded to the optimum angle.
If they're too vertical, they won't drop 'til later.
(I don't figure the last point is relevant to you, if
you've gotten appropriate cone readings in the past,
but I mention it for completeness' sake.)
-Snail
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