It depends on the type of glass, size, and how hot your torch gets. some glass melts at a 105 degrees fahrenheit. also some melts at an hire temperature than some, and it might take a while before it melts.
50
In a well managed workplace, you will need a 'hot work' permit issued by the employer, for each operation when using a blow torch.
At max temperature (2500 F), the butane torch may be able to bend and soften borosilicate glass, but I doubt the torch would be able to completely liquefy it.
Blow glass
the blow torch will blow all the flakes away
It is there to protect the bulb.
With a blow torch.
Are you serious????
Oxygen, and another flammable gas.
redstone torch
Creme Brulee