Multiple layer optical data storage and recording media

Claim 1

An optical data storage and recording medium, comprising a supporting substrate, at least a first layer of low melting temperature suspensive colloid disposed on said substrate, said layer for recording and storing optically written data, wherein said suspensive colloid contains a uniform areawise distribution of very small, non-filamentary, reflective silver particles dispersed in said suspensive colloid, having a diameter primarily less than 350 angstroms and greater than 50 angstroms, said layer being 20% to 80% reflective of light and being electrically non-conducting, and at least one layer of low melting temperature suspensive colloid disposed atop said silver metal layer, containing dispersed, very small reflective metal particles having a diameter primarily less than 350 angstroms and larger than 50 angstroms, said metal particles comprising at least one metal other than silver which is solid at ambient temperatures, said layer having a particle concentration for reducing the reflectivity of said first layer to a desired degree.