Thermal recording medium

A thermal recording medium comprising (1) a heat sensitive softening layer acting also as a contrasting layer and a thin metal layer disposed on said contrasting layer, said thin metal layer having a thickness of 100 to 2000 .ANG., for effecting a first thermal recording, said thin metal layer being composed of low-melting metals or low-melting alloys, and said contrasting layer having a visual contrast to said thin metal layer;

• and (2) a heat sensitive color forming layer disposed on said thin metal layer, for effecting a second thermal recording;
• wherein said first thermal recording is effected by destroying said thin metal layer in defined pattern to disperse fine particles of the melted metal in the softened heat sensitive softening layer;
• said first and second thermal recordings being effected simultaneously in the same pattern by means of the same heat source, thereby forming a visual pattern with a contrast between (a) a first color of {the undestroyed thin metal layer+the uncolored heat sensitive color forming layer}, and (b) a second color of {the contrasting layer as viewed through the destroyed area of said thin metal layer+the colored heat sensitive color forming layer}.

A thermal recording medium comprising (1) a contrasting layer, a thin metal layer having a thickness of 100 to 2000 .ANG. disposed on said contrasting layer and a heat sensitive softening layer disposed on said thin metal layer, for effecting a first thermal recording, said thin metal layer being composed of low-melting metals or low-melting alloys, and said contrasting layer having a visual contrast to said thin metal layer;

• and (2) a heat sensitive color forming layer disposed on said heat sensitive softening layer, for effecting a second thermal recording;
• wherein said first thermal recording is effected by destroying said thin metal layer in defined pattern to disperse fine particles of the melted metal in softened heat sensitive softening layer, said first and second thermal recordings being effected simultaneously in the same pattern by means of the same heat source, thereby forming a visual pattern with a contrast between (a) a first color of {the undestroyed thin metal layer+the uncolored heat sensitive color forming layer}, and (b) a second color of {the contrasting layer as viewed through the destroyed area of said thin metal layer+the colored heat sensitive color forming layer}.

A thermal recording medium comprising (1) a contrasting layer, a first heat sensitive softening layer disposed on said contrasting layer, a thin metal layer having a thickness of 100 to 2000 .ANG. disposed on said first heat sensitive softening layer and a second heat sensitive softening layer disposed on said thin metal layer, for effecting a first thermal recording, said thin metal layer being composed of low-melting metals or low-melting alloys and said contrasting layer having a visual contrast to said thin metal layer;

• and (2) a heat sensitive color forming layer disposed on said second heat sensitive softening layer, for effecting a second thermal recording;
• wherein said first thermal recording is effected by destroying said thin metal layer in defined pattern to disperse fine particles of the melted metal in the softened heat first and second thermal recordings being effected simultaneously in the same pattern by means of a common heat source, thereby forming a visual pattern with a contrast between (a) a first color of {the undestroyed thin metal layer+the uncolored heat sensitive color forming layer}, and (b) a second color of {the contrasting layer as viewed through the destroyed area of said thin metal layer+the colored heat sensitive color forming layer}.

A thermal recording medium comprising (1) a first heat sensitive softening layer acting also as a contrasting layer, a thin metal layer having a thickness of 100 to 2000 .ANG. disposed on said contrasting layer and a second heat sensitive softening layer disposed on said thin metal layer, for effecting a first thermal recording, said thin metal layer being composed of low-melting metals or low-melting alloys, and said contrasting layer having a visual contrast to said thin metal layer;

• and (2) a heat sensitive color forming layer disposed on said second heat sensitive softening layer, for effecting a second thermal recording;
• wherein said first thermal recording is effected by destroying said thin metal layer in defined pattern to disperse fine particles of the melted metal in softened first and second heat sensitive softening layers, and wherein said first and second thermal recordings are effected simultaneously in the same pattern by means of a common heat source, thereby forming a visual pattern with a contrast between (a) a first color of {the undestroyed thin metal layer+the uncolored heat sensitive color forming layer}, and (b) a second color of {the contrasting layer as viewed through the destroyed area of said thin metal layer+the colored heat sensitive color forming layer}.