Disappearing Ink Formulation for Temporary Printing
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Solution Overview
Problem
A significant amount of paper and ink is wasted on documents with short useful lifespans, as existing printing technologies do not efficiently manage the temporary nature of printed information, leading to unnecessary resource consumption and potential security risks.
Innovation Solution
Development of a system using disappearing inks formulated to evaporate or sublimate at varying rates, paired with specially designed substrates that change opacity when wet, allowing for reusable paper that can be recycled after ink disappearance, along with printers capable of selecting and blending inks for controlled disappearance times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If traditional printing methods are used on paper, then documents can be produced and distributed, but paper and ink are wasted on documents with short useful lifespans
Solution Approach 1:
The patent applies parameter changes by formulating ink with specific volatile components (alcohols, esters, ketones, siloxanes) that evaporate or sublime at controlled rates. By adjusting the composition ratios of these components, the disappearance time of the printed indicia can be precisely controlled to match the intended useful lifespan of the document, thereby eliminating waste of both paper and ink.
Solution Approach 2:
The patent utilizes phase transitions (evaporation and sublimation) of volatile components in the ink formulation. These components transition from liquid/gas phase to vapor phase over time, causing the printed indicia to disappear completely. This phase transition mechanism enables temporary printing without permanent waste, as the paper can be reused after the volatile components evaporate.
2Productivity
If disappearing inks are used to reduce waste, then paper can be reused, but the ink must be formulated to evaporate or sublimate at controlled rates
Solution Approach 1:
The patent employs composite materials by combining multiple volatile components (alcohols, esters, ketones, siloxanes) with pigments and other ink additives in specific ratios. This composite formulation allows control over evaporation rate, color properties, and disappearance time simultaneously, enabling paper reuse while managing the complexity through systematic material composition.
3Duration of action of moving object
If multiple ink formulations with different evaporation rates are created, then documents can disappear at desired times, but the printer system becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the ink system into multiple separately controllable reservoirs, each containing ink with different volatile component ratios. The printer can selectively access and use different reservoirs based on the desired disappearance time for each printing task, enabling precise control over document lifespan while managing system complexity through modular architecture.
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
Enables the creation of temporary printed matter that can be reused, reducing waste and ensuring documents disappear at desired times, thus minimizing environmental impact and security risks while allowing for efficient recycling of paper.
Implementation Method 1
a formulation for an ink comprised of ingredients selected to cause the ink to evaporate or sublimate upon deposition onto a surface
Implementation Method 2
a formulation for an ink comprised of ingredients selected to cause the ink to evaporate or sublimate upon deposition onto a surface
Implementation Method 3
a sheet formed with a colored layer covered by an opaque coating that becomes at least translucent and at most transparent when wetted by a liquid
Data Source
AI summary
Methods and/or systems for printing or otherwise evincing temporary indicia on media with disappearing inks are described along with suitable disappearing ink formulations and media constructions for executing the same. In particular embodiments, the methods and/or systems described employ a plurality of disappearing inks with different disappearing rates. In one embodiment, a barrier layer that is selectively used to cover a major surface of the media is employed to substantially block or otherwise regulate a rate of phase transitions (e.g., evaporation and/or sublimation) experienced by ink borne by the media.