REF
REF
Gresto is a rectangular abrasive block (8 x 5 x 2cm) that cleans, polishes, smooths, or causes copper and zinc plates to become matte, but it can also be used on such materials as wood, ceramic, and stone. Adding water, soap, or a turpentine-based product strengthens its effects.
3 grit sizes are available:
Coarse - 70 / Medium - 140 / Fine - 240
Specific References
Ceramic drypoint Matthieu Coulanges
Polyester litho plates 33x50cm 10x
Multiple lines tool Matthieu Coulanges