Volume control

[Stephen Richard]

You have a problem of not enough volume, as glass works best at 6 to 7 mm thicnkess.  you are working with 4mm.  You dont say what the problem with the results of using the Bullseye schedule may be, so further advice is difficult.  I would do my tack fuses at around 785-790C

Stephen Richard

blogs at: http://www.verrier-glass.blogspot.com/ and  http://www.glasstips.blogspot.com/