Microprinting techniques for printing security symbols on a substrate

A method comprising:

• receiving a front side image having a first information section and a first security section with a printsetter;
• generating a first plate having a first microprinting formed in the first plate based on the first security section of the front side image;
• receiving a back side image having a second information section and a second security section;
• generating a second plate having a second microprinting formed in the second plate based on the second security section of the back side image;
• generating a third plate having a first information printing formed in the third plate based on the first information section of the front side image, the front side image including additional front side markings which correspond to the first information printing and have dimensions at least one order of magnitude larger than a micrometer range;
• generating a fourth plate having a second information printing formed in the fourth plate based on the second information section of the back side image, the back side image including additional back side markings which correspond to the second information printing and have dimensions at least one order of magnitude larger than the micrometer range;
• printing on a front side of a substrate with an offset printing press;
• applying ink in a first color to the substrate in a first printing unit of the offset printing press having the first plate;
• applying ink to the front side of the substrate in a third printing unit of the offset printing press having the third plate;
• aligning the substrate to print on a back side of the substrate;
• applying ink in a second color the substrate in a second printing unit of the offset printing press having the second plate;
• applying ink to the back side of the substrate in a fourth printing unit of the offset printing press having the fourth plate;
• capturing a visual media file with a camera connected to the offset printing press of the front side of the substrate with reflected light, the back side of the substrate with reflected light, the front side of the substrate with transmitted light, and the back side of the substrate with transmitted light;
• and
• determining with a microprocessor running computer executable code non-transitorily stored on tangible computer readable media that:
• the first microprinting appears on the front side of the substrate as front side markings of first portions of a plurality of characters having dimensions in the micrometer range and the first information appears as the additional front side markings having dimensions at least one order of magnitude larger than the micrometer range when viewed from the front side with reflected light, the second microprinting appears on the back side of the substrate as back side markings of second portions of the plurality of characters having dimensions in the micrometer range and the second information appears as the additional back side markings having dimensions at least one order of magnitude larger than the micrometer range when viewed from the back side with reflected light, and the first microprinting and the second microprinting in combination appear as microprinting of whole characters of the plurality of characters when viewed with transmitted light.

A method comprising:

• receiving a front side image having a first information section and a first security section with a printsetter;
• generating a first plate having a first microprinting formed in the first plate based on the first security section of the front side image;
• receiving a back side image having a second information section and a second security section;
• generating a second plate having a second microprinting formed in the second plate based on the second security section of the back side image;
• printing on a front side of a substrate with an offset printing press;
• applying ink at a first saturation of color to the substrate in a first printing unit of the offset printing press having the first plate;
• aligning the substrate to print on a back side of the substrate;
• and
• applying ink at a second saturation of color to the substrate in a second printing unit of the offset printing press having the second plate;
• capturing a visual media file with a camera connected to the offset printing press of the front side of the substrate with reflected light, the back side of the substrate with reflected light, the front side of the substrate with transmitted light, and the back side of the substrate with transmitted light;
• and
• determining with a microprocessor running computer executable code non-transitorily stored on tangible computer readable media that:
• the first microprinting appears on the front side of the substrate as front side markings of first portions of a plurality of characters having dimensions in a micrometer range when viewed from the front side with reflected light, the second microprinting appears on the back side of the substrate as back side markings of second portions of the plurality of characters having dimensions in the micrometer range when viewed from the back side with reflected light, and the first microprinting and the second microprinting in combination appear as microprinting of whole characters of the plurality of characters when viewed with transmitted light.