Yeah, I have a hard time imagining it too, but I can see it. It's not a lot, but enough that I don't want more.taxy, I'm having a real hard time imagining a knife of any sort cutting glass. Once that happened, have you continued to use a knife with the glass? Aren't you concerned about glass dust/particles?
I use a dental drill to etch on glass but these tips have diamond dust on them.
Edit: are you confusing a remark I mentioned of dinner knives leaving a mark on white dinner plates?
And no, I'm not confusing it with the other reply with the white dinner plates.
I don't use a dinner knife to cut lasagna into serving portions. I use something sharper....that's even scraping them with a spatula or a dinner knife on the rare occasion when it's really thick.