Someone had this question about etching rocks as shown below and I posted my response for tips that might help you.
Eric, I just happened upon your site because I am interested in getting a sandblaster to etch in rock/stone of various geological hardnesses. We have so very many gorgeous rocks on our old property and I would love to do some etching on them. It would make superb gifts!
In reading through yours and a couple other sites, I was able to pick up some great information, but I’m still not sure exactly what I will need?
I know I will need some larger abrasive material because I would want to etch significantly enough to make the patterns/words stand out.
Would it depend on the type of stone?
We have regular metamorphic rocks, and a few softer sedimentary rocks. We have collected some harder igneous rocks as well.
I just have no idea how to decide what I will need/start shopping for???
Any help/suggestions would be greatly appreciated.
Thank you.
Sincerely,
Tricia
My Response:
Etching rocks is better known as sandcarving or sandblasting rocks as I showed before. You will have to experiment on the different types of rock but the most important things you need to know is:
- You must use a pressure pot sandblaster.
- You will usually need a thicker stencil about 5 mils or larger.
- Abrasive should be as hard as the rock- I recommend aluminum oxide
- You can use all sizes of abrasive grit but I suggest 90- 150.
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