"FSHP3" Firing Schedule

Shimbo Crystal Holding Pattern 3

From page 139 in Crystal Glazes book 2.

No kiln will be able to achieve one or more of these rates of climb or drop. And, all but very small or thin-walled ware would crack. Fara’s intention is that the degree to which it is possible will determine how well crystals will grow.

Step	°C	°F	Hold	Time
1	100°C/hr to 250C	180°F/hr to 482F		2:32
2	250°C/hr to 500C	450°F/hr to 932F		3:32
3	500°C/hr to 1221C	900°F/hr to 2229F		4:58
4	999°C/hr to 1075C	1798°F/hr to 1967F	15min	5:22
5	100°C/hr to 1100C	180°F/hr to 2012F	15min	5:52
6	100°C/hr to 1075C	180°F/hr to 1967F	15min	6:22
7	100°C/hr to 1050C	180°F/hr to 1922F	15min	6:52
10	100°C/hr to 1075C	180°F/hr to 1967F	15min	7:22

Start temperature assumed: 25°C or 75°F
"Fahrenheit degrees" is not the same as "degrees Fahrenheit". A 100° reading on a Fahrenheit thermometer is equal to a 37° reading on a Celcius thermometer. But "100 Fahrenheit degrees of temperature change" is equivalent "55 Celsius degrees of change". That is an important distinction to understand the above temperature conversions.

Related Information

Bory 1

This picture has its own page with more detail, click here to see it.

These Bory 1 crystals (colored with nickel, iron and cobalt) fired using the FSHP3 schedule. Rather than going to a temperature as fast as possible, the kiln climbs (whether going up or down) at a rate of 100° per hour.

Links

Typecodes	Oxidation Firing
Recipes	BORY1 - Bory 1 Crystalline Glaze Cone 6-10 - Added Gerstley Borate lowers temperature to cone 6, titanium to seed crystals

By Tony Hansen
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