Non-label printing process for direct thermal imaging materials including an organic silver salt

摘要

A printing process for a substantially light-insensitive thermographic monosheet material having two edges parallel to one another and 12 cm apart (non-label) for obtaining a desired optical density and a desired colour tone comprising:;selecting a thermographic monosheet material, the selected thermographic monosheet material being a black and white;thermographic monosheet material having a support and a thermosensitive element;;supplying image data to a processing unit of a thermal printer including a printhead having energizable heating elements arranged in a column C;;converting the image data which are not zero into at least one activation pulse per pixel to be printed;;energising the heating elements printing-line by printing-line adjacent to the selected substantially light-insensitive thermographic monosheet material thereby producing an image;;transporting the imaging material past and adjacent to the printhead in a transport direction with a transport system;;forming an image dot with a heat energy of 50 to 200 mJ/mm² of heating element surface area;;wherein the thermosensitive element contains a substantially light-insensitive organic silver salt, a reducing agent therefor in thermal working relationship therewith and a binder; and the thermosensitive element excludes a colourless or light coloured dye precursor and and also excludes an encapsulated organic silver salt in a heat-responsive microcapsule.