From page 144 in Mastering Glazes.
Step 1 is to provide time for all remaining or residual water in glaze and clay to evaporate. However 220F may not be high enough, 250F is usually needed (and will not fracture ware). This segment should also have a hold, at least 60 minutes.
55°C/hr to 105C
99°F/hr to 221F
200°C/hr to 1080C
360°F/hr to 1976F
85°C/hr to 1200C
153°F/hr to 2192F
Confirm with self supporting cone
275°C/hr to 1000C
495°F/hr to 1832F
70°C/hr to 760C
126°F/hr to 1400F
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.