| 摘要 |
<p>A signal and image recording process comprising; 1) providing a recording medium comprising an electrochromic material, which comprises a hemogeneous mixture, having a solid consistency, of a) a hydrosoluble salt or a hydrosoluble mixture of salts of a metal cathodically depositable from an aqueous solution of its ions; b) an initially hydrosoluble film-forming polymer resin; and c) water; 2) placing in contact with a free surface of the electrochromic material, at a place where a mark is to be made, a first electrode which is negatively polarized with respect to a second electrode also in contact with the electrochromic material in order to pass an electric current between both electrodes across the electrochromic material; and 3) passing an electric current between said electrodes whereby there is formed within the electrochromic material, in the area of contact with the first electrode, a visible mark by cathodically reducing depositable metal.</p> |
