LIGHT-SENSITIVE MATERIAL FOR OBTAINING IMAGES VIA PHYSICAL DEVELOPMENT Russian patent published in 2011 - IPC G03C1/73 C07C50/12 

FIELD: physics.

SUBSTANCE: light-sensitive photographic material consists of a substrate saturated with a solution of light-sensitive substances in form of successively deposited derivatives of 2-amino-1,4-naphthoquinon-2-amino-(3'-acetoxyphenyl)-3-piperdino-1,4-naphthoquinone (I) and a quaternary salt of 4-(1,4-naphthoquinoyl-2-)-1,1'-dimethylpiperazonium iodide (II).

EFFECT: simultaneous inclusion of a cationic and neutral derivative of amino-1,4-naphthoquinone into the light-sensitive layer ensures six-fold increase in light sensitivity of the photographic material.

2 cl, 1 dwg, 3 ex