Sandblasting is done in layers.
Starting with the areas that will be blasted the most, peal the resist away, then blast to the desired depth.
peal & blast
peal & blast
When the piece requires deep carving sandblast away the areas that are being removed first.
Then think in terms of black & white, but everything that is “black” in a normal drawing will be white, with sandblasting. The “darkest” lines will be solid white. Those areas should be blasted first.
Then the areas that should be white, in a normal drawing will now be clear. The blank page is the clear glass.
