New favorite marker

A Helios customer recently gave me one of these to try out for marking glass before cutting:


Amazingly, the ink stays in place when grinding and cutting – no Vaseline or other gunk needed – and then wipes right off when done.

How have I not known about these before this???

If you cannot find them locally, here’s a link to purchase on Amazon:

Stabilo Ohpen Superfine Black on Amazon

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