Firing Sculpture

Electric Car Kiln firing Schedule for Large Sculpture
Steps to follow:

1. Place two cone packs into place inside kiln using a flash light to see clearly
2. Kiln plugs out til 750 degrees then insert
3. Close door fully – borrow a digital pyrometer from Ray and use it to check temps on upper pyrometer. Let Nan know how close they are.-
4. Set limit pyrometer (top one) to maximum firing temperature for the firing
5. Set control pyrometer (lower one) to 80 degrees
6. Follow start steps on kiln – turn on power toggle switch – hit reset button – turn on bottom left switch ( this powers the bottom left and bottom back of the kiln. Since the kiln in a long tunnel we want to heat the kiln back to front).
7. Preheat kiln for 4 hours at 80 degrees.
8. Turn bottom left switch off – Turn bottom right switch on - Continue preheat for another 4 hours at 80 degrees.
9. Turn bottom right switch back on and set pyrometer to 120 degrees – hold for 2 hours – check for steam???
10. If there is no steam coming out of the top peep hole after the 2 hour hold increase temp to 212 degrees – hold 2 hours.
11. You are now finished the slow pre-heat cycle if there is no steam (total hours was 12 hours).
12. If there is steam hold for another hour.
13. Begin hourly turn ups – 80 degrees an hour – 212 + 80 is 292 so go to 300 degrees.
14. In one hour got to 380
15. In one hour go to 460
16. In one hour go to 560 (100 degree increase)
17. In one hour go to 660
18. In one hour go to 760 – hold one hour at this temp ( chemical water goes out here)
19. Put plugs in peep holes.
20. In one hour go to 860
21. In one hour go to 960
22. In one hour got to 1060 (Chemical quartz inversion)
23. In one hour go to 1160
24. In one hour got to 1300
25. In one hour go to 1480
26. In one hour got to 1660
27. In one hour go to 1840
28. If you are firing to cone 06 check cones.
29. When cone 06 bends turn off kiln.