One of my subscribers asked this question about sand carving and the abrasive grit and pressure settings below. I thought it might be beneficial to someone else as well. See my response below and ask any questions in the comment section.
Looking to do glass, wood, and stone- decorative styles. How are the different substrate handled
as far as pressure and grit. time of blasting. Currently starting out with the micro blasters also termed erasers to move up to actual 3d carving.
Trying to turn this into an income source.
If you want to do sand carving then you would need a pressure pot sandblaster. For pressures, it would be about 30 psi plus or minus 10 depending on the depth of the etch for typical engravings. And about 30 to 60 PSI for deeper sandcarvings. It’s kind of a preference thing for pressure with a high pressure obviously carving quicker. I recommend just starting at a lower pressure and working up on practice glass to find a pressure you most prefer.
Grit size varies also on preference and for the substrate your using. Industry guidelines are to use about 100-220 for glass (my preference is 180), 50- 150 for stone/wood. I actually prefer to use my 180 grit when carving into small stones. If your doing both, I would just get 150 grit so that you don’t have to get two different sizes.
The types of abrasive should be harder than the substrate. I prefer aluminum oxide.
Hope the best!
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