Security paper with color mark

A laminated security paper comprising:

• a resinous substrate layer having a first face and a second face;
• color indicia printed on said first face of said substrate layer with transparent ink, said color indicia including at least one region having a color corresponding to a wavelength of light of from 380 to 720 nonometers;
• a first layer of adhesive disposed on said first face of said substrate layer, over said color indicia;
• a second layer of adhesive disposed on said second face of said substrate layer;
• a first layer of paper disposed over said first adhesive layer and fixed permanently to said substrate layer and said color indicia by said first adhesive layer;
• and
• a second layer of paper disposed over said second adhesive layer and fixed permanently to said substrate layer by said second adhesive layer.

The security document comprising:

• a resinous substrate sheet having two faces;
• transparent indicia disposed on one of said faces of said resinous substrate sheet;
• a first and a second paper sheets, each of said paper sheets having an inner face and an outer face, one of said paper sheets being permanently laminated on a respective face of said resinous substrate sheet by means of an adhesive applied between said respective face of said substrate sheet and said inner face of each of said paper sheets;
• and
• a set of indicia printed on at least one of said outer faces of said paper sheets, whereby said transparent indicia on said substrate sheet cooperate with said set of indicia to form a total image when viewed in transmitted light.

A method for manufacturing a security paper comprising the steps of:

• defining a graphic design in color;
• printing said graphic design on a resinous substrate sheet as a substantially transparent color image;
• and,
• permanently laminating said printed substrate sheet between two paper sheets by means of an adhesive.

A method for manufacturing a security document comprising the steps of:

• defining a graphic design in color;
• printing said graphic design on a resinous substrate sheet as a substantially transparent color image;
• permanently laminating said printed substrate sheet between two paper sheets by means of an adhesive;
• and
• printing a set of indicia on an outer surface of at least one of said paper sheets, whereby said graphic design on said substrate sheet cooperates with said set of indicia to form a total image when viewed in transmitted light.