Jack, I’m not sure why you are so insistent that we understand we can’t melt or cut glass with a laser… or why we can’t directly engrave glass with our lasers. But that’s not what we’re trying to do here, either. This thread IIRC is about using the NWT method – an indirect method – to engrave tile… and Ron’s “recipes” for using “raw” TiO2 rather than commercially available white spray paint.
I’m also aware of the no-paint, thru-the-glass, method… check it out in my thread.
– David