Security Document Ink Layer Blended Color Pattern
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Solution Overview
Problem
Current security printing methods lack sufficient complexity and uniqueness in color patterns, making them vulnerable to copying and counterfeiting, as they often rely on single or simple multiple color inks without blended zones.
Innovation Solution
The implementation of a split ink fountain printing process, where print media is conveyed through a printing device multiple times in different orientations to apply multiple ink layers with blended color zones, creating a complex pattern of colors that are difficult to reproduce.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple color inks are used in a printing fountain, then color pattern complexity increases, but manufacturing precision decreases due to difficulty in reproducing blended colors
Solution Approach 1:
The ink fountain is segmented into multiple zones, each applying a different color ink. This segmentation creates distinct color zones that blend at their boundaries, producing complex color patterns that are difficult to reproduce without precisely copying the entire multi-zone configuration
Solution Approach 2:
Different regions of the printing fountain have different color properties. Each zone applies a specific color, and the blended zones create unique transitional colors. This local variation in color quality increases pattern complexity while the segmented structure maintains manufacturing precision by making exact reproduction difficult
2Reliability
If print media is conveyed through printing device multiple times in different orientations, then security against counterfeiting increases, but productivity decreases
Solution Approach 1:
The printing process extends into the temporal dimension by conveying print media through the printing device multiple times in different orientations. This multi-pass approach creates complex overlapping color patterns that enhance security against counterfeiting, while the systematic arrangement of passes maintains reasonable productivity
Data Source
AI summary
A security document includes a first ink layer and a second ink layer. The first ink layer includes a first color in a first color zone and a second color in a second color zone offset from the first color zone in a first direction, and a first blended color including a mixture of the first and second colors in a first blended color zone between the first color zone and the second color zone. The second ink layer includes a third color in a third color zone and a fourth color in a fourth color zone offset from the third color zone in a second direction, and a second blended color including a mixture of the third and fourth colors in a second blended color zone between the third color zone and the fourth color zone. The first direction is different than the second direction.