Hot Rods Glass, its goin up

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The sheets I buy to cut from have the label in one corner. I'm back at work at the firehouse but I'll get you a picture when I get back to the shop tmrw. If I buy a sheet of tinted/ shaded, it also has the dot marks for how far down the shade can go.

 

Thanks, Lloyd. I was just kinda wondering what exactly the "ink" that is used is made from. I was told it etched the glass, but it stands slightly proud. Tough stuff. This is all just curiosity, while I actually think about it - for now. I know glass sheets come w/"a" stamp on them, then what for smaller pieces? Thinking of ~ 4'x8' sheets here. Hadn't thought of this since the early 80's, at least. Don't recall having seen shade-level dot-marks. Appreciate pics. No hurry on pics, whenever you get time.
Marcus...

 

I looked around the shop and I don't have any leftover shaded glass to show the reference marks, but here is the stamp on the corner of the laminate. It has a DOT number.