Glass engraving - detecting a stress line in glass with polaroid film

Glass engraving - detecting a stress line in glass
This is an older video which I have now released from my Patreon Teaching channel / glassengraving where you will find MANY more of my latest teaching videos, live chats and much more.

[@Cynaephyra]

I wonder if it was over heated when they did the rim on that one glass.

[@glassengraver]

In my experience, if one has it, they all do.

[@anagoncalves3015]

I'm starting to learn on my own. I noticed, when I work at a higher speed, that there is a black residue on the work. Could it be traces of metal from the tip? I can't eliminate it with alcohol. How to avoid?

[@glassengraver]

Great that you are getting into it. For all questions and discussions please join my teaching channel www.patreon.com/glassengraving happy engraving.