I tried my hand at making some glass coasters. I had purchased some coasters long ago while I was waiting for my Glowforge from “Glasscoasterstore.com”. The plain clear glass ones were super cheap so I have 3 boxes of them. I decided to try them first. They have little soft plastic feet on them so I turned them upside down and told my Glowforge that I had medium acrylic in it. Yes, I know I lied, but it worked. I did not use any masking on the glass. Here is what I ended up with.
I was thinking, boy I am getting pretty good at this until I showed it to my wife. She liked the design, but said that a solid glass coaster will stick to the bottom of a wet glass, fall off, break and make a mess. Where was she and her “wisdom” when I was buying them?
Anyway, next I tried some cermark spray on some. I had never used any of this before, and need to tell you that the directions do not tell you how much of a mess you can make with that stuff. The stuff is like a graphite powder and gets all over your hands no matter how careful you are. Here is a picture of what I ended up with.
The text in the picture looks grey but it is black. It feels rough to the touch. The part that isn’t hit by the laser washes off easily, but don’t do it in a sink that your wife will see. It makes a real mess with splatters. I will be doing any others out side with the hose.
I remember reading something about having to use masking on the glass so the Glowforge can see the thickness, but I didn’t. I don’t really have the thickness part worked out yet, but it appears to work the way I did it.