Plus just place punch card on paper apply a paint with brush of better spray and you printed your holes will be printed on paper share anyone (Softcopy ツ)

alternatively for fun use photographic chemical film paper and dark room, place plate on light source flash and capture holes on film

Steganography ideas Another fun-> divide cut plate into puzzle give pieces to different people only when puzzle combined reveals full datà

Another -> Have two or more plates with extraa binary bits holes and masking plates, when they are superimposed/stacked in proper order or aligment then uncessary bits will be masked revealing useful bits