How heat-shrink tubing reacts when exposed to the arc of an electric-arc lighter

HerpDerp Mucking About With Things The Diary of Lupin Pooter
The heat-shrink tubing shrunk, but not in an aesthetically pleasing way.
LEFT: tubing shrunk by exposure to a flame. RIGHT: tubing shrunk via placement very near the arc of an electric-arc lighter.

If you’ve ever wondered what the arc of a flame-less lighter would do to heat-shrink tubing, the above photo may be of interest. In addition to having a rough texture (a consequence of the unevenly pockmarked surface), it seems more rigid in a sort of this-stretch-of-tubing-will-be-brittle-sooner sort of way than the same type of tubing shrunk using a regular lighter’s flame.