This is a demonstration of processing a glass tube into a heat shrinkable tube using a carbon ring heater.

Please check the following site for more information.

Related page:

Heat shrink tube processing of copper tube Heat shrink tube processing for electric wires Heat shrink tube processing of PVC pipe Heat shrink tube processing of stainless steel pipe Heat shrink tube processing of aluminum pipe Heat shrink tube processing of reinforcing bars Shrinkage of heat shrink tube with heat resistance of 200℃ No.10 Pre-heating glass processing