Patent ID: 11943416
Assignee: HYDRAGRAPHIX LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC B  H  A | IPC A  H

Claim 19:
20. A document comprising:
a substrate;
redundantly printed process color variable indicia conveying variable information printed on the substrate, the process color variable indicum comprising a plurality of component colors with each component color determined with a level greater than a predetermined minimum Signal-to-Noise-ratio threshold relative to a background of the substrate surrounding the variable indicia when viewed in any of red, green, or blue channels of an additive color model as calculated by a Modified Weber's Fraction equation, such that at least two of the component colors comprising the variable indicum coveys a meaning of the variable information of the process color variable indicia when viewed in at least one channel of the additive color model; and
a scratch-off coating covering a portion of the process color variable indicia.