Slow Cool glazes against different temperatures can produce dramatically different finishes. Many Coyote glazes are specially designed to take advantage of this to create special effects, and many more affect glazes in surprising ways. All Coyote glazes can be slow cooled.

Slow cooling effectively extends the firing period, during which most crystals develop, resulting in more and larger crystals. Depending on the composition of the glaze, this will usually produce large visible crystals, or a matted surface (microcrystals).

To slowly cool a glaze, bake in an oven with a digital controller. Since the control panels of programmable ovens vary from brand to brand, you should consult your oven’s owner’s manual or contact the seller or manufacturer of the oven for instructions on programming your particular oven.

Once you know how to program your oven, it’s a matter of experimentation to find the firing curve that works best for your products. The only way to make sure your oven is fired correctly is to use witness cones. As a starting point, our diagram is below:

Firing curve in Degrees Celsius
0 – 105°C in 2.5 hours
105°C – 1095°C in 5.5 hours
1095°C – 1205°C IN 0.5 hours + 15 minutes of commute
1205°C – 1176°C in 0.5 hours + 15 minutes of commute
1176°C – 760°C in 8 hours
allow to cool further below 50°C

It is important to note that you must adapt this diagram for your own furnace and firing. Every kiln is different, so there is no diagram that works for every firing.
The tip of your self-supporting cone 5 should be flush with the base in every case, and the tip of the cone 6 should not touch the shelf.