We studied the printing process of the thermal transfer multi-printing ribbon. The ribbon was designed with an ink layer which can be torn apart on account of cohesive failure at an intermediate portion of ink itself. its construction is different from that of the usual multi-printing ribbons on the market.
The repeat usage and print quality of these ribbons including multi-printing ribbons on the market was examined under various printing conditions. The “High-Speed Print Quality Measurement System”, developed in our laboratories, was used for evaluation of print quality.
The following has been determined.
1) Under ideal printing conditions, our ribbon can be used repeatedly with good print quality.
2) The repeat usage and the print quality of our ribbon are influenced chiefly by printing speed and the electric power applied to a thermal-head. This fact suggests that the temperature control of an ink layer at peel time is important in obtaining good print quality for6ur ribbon. This temperature influence will be connected with the cohesive properties of the ink layer.
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