Programming the Pro-Fusion Kilns
:
This is a common firing schedule recommended by many glass companies:
300° an hour/ 1200°F / Hold 30 min to one hour (bubble squeeze)
500° an hour/1480°F /Hold 10 min
Full / 950°F /Hold 60 min
150° an hour/700°F /Hold 0 min
We are going to speed the fusing up to save time and electricity
Try the slower firing schedule for the fiber kiln for one or two firings for each sized piece, speed it
up every firing as much as the glass will tolerate. The smaller the pieces are, the faster you can go.
Below, are what we have done in our firings, from where we started and what we have achieved
over the years.
Start Here Then Try This Pro Fusion 16 Full Fuse
Brick Kiln Firing
Fiber Slow Firing
Fiber Fast Firing
Good Pro Fusion 16 Program
Ra1 300⁰ per hour
Ra1 500⁰ per hour
Ra1 750⁰ per hour
Ra1 500⁰ per hour
⁰F1 1200⁰ degrees
⁰F1 1500⁰ F
⁰F1 1500⁰ F
⁰F1 1000⁰ F
Hld1 30 minutes
Hld1 10 minutes
Hld1 5 minutes
Hld1 10 minutes
Ra2 500⁰ per hour
Ra2 Full per hour
Ra2 Full per hour
Ra2 Full per hour
⁰F2 1480⁰ degrees
⁰F2 950⁰ degrees
⁰F2 950⁰ degrees
⁰F2 1500⁰ degrees
Hld 2 20 minutes
Hld 2 30 minutes
Hld 2 30 minutes
Hld 2 10 minutes
Ra3 Full
Ra3 0000 Ends Program RA3 0000 Ends Program
Ra3 Full
⁰F3 950⁰ degrees
⁰F3 950⁰ degrees
Hld3 30 to 1 hour
Hld3 minutes
Ra4 200 per hour
Ra4 0000 Ends Program
⁰F4 700 degrees
*Full for the Bonnie Glo kiln
Hld4 0
***is about 1500⁰F per hour
Ra5 0000 Ends Program
***Using a rate of FULL in the first 1000 degrees of the firing is appropriate only for pieces less
than 3” squared and less than 3 layers thick. Larger pieces can go “FULL” after the first 1000
degrees, or as fast as the piece will tolerate. Taking the time to conduct a few test firings will go a
long way in knowing what your kiln can and cannot do for you.
Annealing
is an important step of a firing schedule to reduce stress. On the way down, hold
around 950°F for a length of time relative to the size of the pieces to help reduce internal stress.
(Bullseye's current recommended anneal temp is 900°F.) In a fiber kiln, jewelry sized pieces
