Creating in borosilicate glass sounds daunting for those of us in soft glass! It did for me. Especially because for years I have been reading about how I need more than a 5LPM oxy-con to work it, and preferably something more than a minor torch.
I was working in the studio one day and came across a bag of dichro scrap. It looked like broken window scraps. Not much color, and it didnt go all the way to the edge. I clamped a piece and put it in the flame.. nothing happened. not cracking, no melting. Humm. I went back and read the label. It was COE 33! Boro! I cranked up the heat and played with it a bit. Of course what did I go for first? My Jim More Spiral Tongs! Amazing! I worked it like I would in soft glass, keeping the coated side out of the flame. The edges that were not coated by the dichro seemed to create a border to the texture and faded into the pattern as I worked. I was in love.... Thus a tutorial was born!
Any other tools to texture
Dichro scrap glass is redly available from many major glass supply companies, and e-bay.