| 摘要 |
The drawing illustrates a printable medium 1 comprising paper support 11, conductive film 12 and printing layer 13 associated with writing current probes 31 and 35 and common return electrode 5. A printed letter P is shown. The layer 13 comprises a thermally sensitive image forming compound and a finely divided conductive material embedded in a suitable carrier. The carrier may comprise a polymer binder e.e. polycarbonate, polyester, polyurethane, Kapton* and the conductive material may comprise suspended particles of, for example, zinc iodide, zinc oxide, tin oxide, titanium dioxide or a mixture. The image forming compound may comprise for example silver behenate, leucoform triphenylmethane dye. Appropriate dye precursors and/or a roughening agent may also be present. |
