Glass cracking, latticework

[jackw_42]

Hi there, i've just started lamp working. I'm currently trying to figure out how to do the lattice work, demonstrated in this picture (the base of the animal). I just about got the technique, unfortunately the glass keeps breaking as i get further up the pattern.

any ideas on how to stop this?

thanks, Jack

[jamie lynne]

Use boro, or once you are done with a section NEVER put it back in the flame if you are using soft glass.