We do not currently know of any antonyms for graphotype.
The noun graphotype is defined as:
A process for producing a design upon a surface in relief so that it can be printed from. Prepared chalk or zinc oxide is pressed upon a smooth plate by a hydraulicpress, and the design is drawn upon this in a peculiar ink which hardens the surface wherever it is applied. The surface is then carefully rubbed or brushed, leaving the lines in relief.