Sand etching is the abrasion, or roughening, of the surface of glass, stone, ceramic, wood, metals, and other medias to produce a design or a monogram.
Photosensitive masks of each design are created and hand applied to the surface of each glass in the preparation for the artist to then sand blast them...one-by-one.
High pressure sand is sprayed through a nozzle to slowly etch away the surface.
The sand blasting process creates amazing detail in glass and a deep cut design which you cannot get with laser etching.
Sandblasting in permanent. It will not fade or wash off.