Electrosensitive media and recording process

Abstract From the Canadian patent

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 …