Braille printing without embossing or engraving, allows granulate to adhere to freshly printed braille and expand by heat application

摘要

Braille is printed using offset machine, swellable granulate is applied to adhere to fresh braille text which has residual moisture. Non-adhered granulate is sucked back to supply container. Temperature is then applied, 60 to 200 degrees C to swell granulate more. Granulate is mixture of resin and quartz.