High contrast printing material

摘要

This invention relates to an ink impregnated material, particularly an ink roll, useful in the printing of high contrast images suitable for laser scanning. The ink roll according to the invention is a microporous polymeric structure impregnated with an ink. The ink is repetitively transferable to a surface in sufficient quantity to produce thousands of visible images. The invention further provides a method for printing a light scannable, coded image, and an apparatus therefor.