Tamper-Evident ID Document with Solvent-Insoluble Embedded Patterns
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Solution Overview
Problem
Identification documents lack effective tamper evidence mechanisms to prevent solvent delamination and counterfeiting attempts, which can alter or extract personal images and data.
Innovation Solution
Incorporating an inner core layer with embedded solvent-insoluble patterns and a laminate layer, where the pattern is cured to polymerize and encapsulate personal information, and using a release material layer with score or die cut lines to ensure visually detectable tampering upon solvent attacks, and employing monochrome ink jet ink with solvent-soluble dyes for ghost images to bleed and evidence tampering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional identification documents are used without anti-counterfeiting features, then the document structure remains simple and manufacturing is easy, but the documents lack tamper evidence and are vulnerable to solvent delamination and counterfeiting attempts
Solution Approach 1:
The document is divided into multiple functional layers: an inner core layer containing the image receiving layer with personal information, an outer laminate layer providing protection, and a release material layer with score lines for controlled delamination. This segmentation allows each layer to perform its specific function while collectively providing tamper evidence capability.
Solution Approach 2:
The image receiving layer is nested within the inner core layer, which is in turn nested within the outer laminate layer. The release material layer is positioned between the inner core layer and the outer laminate layer. This nested structure allows the document to maintain a compact form while incorporating multiple security features without significantly increasing overall complexity.
2Object-affected harmful factors
If solvent delamination is used to attack the document, then personal images and data can be extracted or altered, but the bonding strength between layers must be greater than the release material layer to prevent successful extraction
Solution Approach 1:
The release material layer with score or die cut lines is designed to fail first during solvent attacks, converting the harmful solvent delamination process into a beneficial tamper evidence mechanism. When solvents are applied, the release material layer delaminates at the score lines, causing the outer laminate layer to separate from the inner core layer and exposing the embedded pattern, thereby providing visual evidence of tampering while protecting the personal information.
Solution Approach 2:
The release material layer is pre-configured with score or die cut lines that are weaker than the bonding between the inner core layer and outer laminate layer. This preliminary structural arrangement ensures that during solvent attacks, the release material layer will delaminate first at predetermined locations, preventing successful extraction of personal information while providing visual tamper evidence.
3Reliability
If an embedded pattern is added to the image receiving layer to provide tamper evidence, then counterfeiting attempts become detectable, but the manufacturing process becomes more complex
Solution Approach 1:
The embedded pattern is merged with the image receiving layer during the same manufacturing process. The pattern is formed by embedding material into the image receiving layer before lamination, combining the security feature integration with the normal document assembly process. This merging approach provides counterfeiting detection capability without requiring separate manufacturing steps, thereby maintaining ease of manufacture.
4Reliability
If monochrome ink jet ink with solvent-soluble dyes is used for ghost images, then the ghost images can bleed to evidence tampering, but the ink may be affected by solvent exposure during normal handling
Solution Approach 1:
The ghost image is positioned in a specific location on the image receiving layer, and the ink is formulated with solvent-soluble dyes that remain stable during normal handling but bleed when solvent attacks occur. The local positioning and selective solvent solubility create a contrast between normal use conditions and tamper conditions, allowing the ghost image to serve as tamper evidence without being affected by routine handling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides visually detectable tampering evidence when solvent attacks are attempted, preventing successful extraction of images and data, and ensuring the integrity of the document is compromised, thus deterring counterfeiting.
Implementation Method 1
the embedded pattern may be comprised of a solvent insoluble material wherein the embedded pattern is a monomer material which, after contacting the at least one or more fixed or variable items information, is cured to polymerize the pattern
Implementation Method 2
the ink jet ink including a dye which is soluble in solvents; and, wherein, attempted delamination of the document using solvents results in the ink forming the ghost image bleeding to evidence tampering of the document
Implementation Method 3
the bonding strength of the core layer to the image receiving layer and the laminate layer being greater than the bonding strength of the release material layer to the core layer
Data Source
AI summary
An identification document which includes anti-counterfeiting features to provide tamper evidence in response to counterfeiting attempts includes an image receiving area having one or more fixed or variable items of information. In one embodiment, a pattern of material is embedded into the image receiving layer in the vicinity of the one or more fixed or variable items of information in a predetermined configuration. The embedded pattern is comprised of a solvent insoluble material such that attempted delamination of the document using solvents results in visually detectable tampering.