When it comes to sandblasting abrasives many people in the industry underestimate the importance of using the correctly size abrasive for the job.
First, it’s important to understand what the mesh size means. What’s a 30/60 vs an 80 mesh? These numbers refer to the physical size of the abrasive particles as to relate to a linear inch. 30 mesh means you’ve got thirty abrasive participles in a line that take up an inch. 80 mesh can fit eighty particles in that same inch. So the higher the number the smaller the abrasive particle. It’s the same as sandpaper.
When you have a 30/60, all the abrasive particles are supposed to be in that size range between 30-60 mesh.