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I use commercial glazes and wonder if Ramp-Hold programming would produce better results than Cone-Fire, but I am not sure what the purpose of Ramp-Hold is.

Cone-Fire mode uses firing schedules designed by the Orton Ceramic Foundation. Those schedules are safe and produce excellent results. Ramp-Hold mode allows you to customize the firing and cooling rates. Suppose you needed to fire slower than the slow speed in Cone-Fire, because you produce extra thick ware. Ramp-Hold will fire the kiln as slow as you want. Or suppose you want to fire the kiln much faster than you can in Cone-Fire mode. Ramp-Hold will allow you to do that. Cone-Fire mode in the Sentry controller includes an adjustable controlled cooling rate. It begins after the cone fires to maturity and ends at 392F / 200C. In Ramp-Hold you can determine when to start and stop the controlled cooling. Ramp-Hold is also useful for crystalline glazes and for duplicating a favorite firing schedule from, for instance, a manual kiln that you've used for years. (To duplicate a firing schedule from a switch-operated kiln, you will need to monitor the manual kiln firing with a pyrometer.)

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