Electric recording material and electric recording process

摘要

An electric recording material comprising a support and an electrically conductive recording layer formed at least in the surface portion of the substrate, which recording layer is composed of a dispersion of a basic salt of divalent tin or tin (II) hydroxide in an electrically conductive medium, gives an image having high density and contrast at relatively low electric power when applied to an electrolytic recording process utilizing cathodic reduction. This image can be preserved for a long time without discoloration of the background. Especially good results are obtained when a specific polyhydric alcohol is incorporated in the recording layer optionally with a specific organic sulfur compound. This recording material is effectively applied to an electric recording process comprising electrically connecting this recording material between a cathode stylus and a counter anode so that the recording layer falls in contact with the cathode stylus, moving the cathode stylus and recording material relatively to scan the cathode stylus over the surface of the recording layer, and simultaneously applying electric signals between the cathode stylus and counter anode to form a visible image on the recording layer.