Rinsable Ink Composition for Washability Without Paper Bleed
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Solution Overview
Problem
Current washable inks often stain surfaces and bleed through paper substrates, and existing solutions are not cost-efficient or effective in being rinsed from fabrics and walls without using soap.
Innovation Solution
A rinsable ink composition comprising water, sugars such as dextrins, dyes, and optional additives, which allows for easy removal from surfaces like cotton fabric and painted walls using only water, without surfactants, while maintaining color vibrancy and preventing bleeding through paper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymeric colorants and dye blockers are used to impart fabric washability, then washability is improved, but cost increases and color vibrancy decreases
Solution Approach 1:
The patent changes the chemical composition parameters by replacing polymeric colorants with natural pigment sources (plants, minerals, insects) and adjusting the binder composition to use natural substances like gum arabic and gelatin. This parameter change achieves washability without requiring expensive synthetic polymers and dye blockers, thereby reducing cost while maintaining color vibrancy through careful selection of natural pigments
Solution Approach 2:
The patent employs inexpensive natural materials such as plant extracts, mineral pigments, and common natural binders (gum arabic, gelatin) that are readily available and low-cost. These natural components provide the necessary washability properties without requiring expensive synthetic additives, making the ink composition cost-effective while maintaining vibrant colors from natural sources
2Reliability
If polymeric colorants and dye blockers are used to impart fabric washability, then washability is improved, but color vibrancy decreases
Solution Approach 1:
The patent changes the chemical composition by eliminating polymeric colorants and dye blockers that mute colors, and instead using pure natural pigments from plants, minerals, and insects. The binder system is changed to natural substances that do not interfere with color expression. This parameter change restores color vibrancy while achieving washability through the natural properties of the selected pigments and binders
Solution Approach 2:
The patent extracts and removes the harmful components (polymeric colorants and dye blockers) that reduce color vibrancy. By taking out these synthetic additives and replacing them with pure natural pigments and natural binders, the ink achieves both washability and vibrant color expression without the compromising effects of synthetic polymers and dye blocking agents
3Reliability
If conventional washable inks are used, then fabric washability is improved, but rinsability from walls and fabric without soap is worsened
Solution Approach 1:
The patent changes the surfactant system from synthetic polymeric washability agents to natural surfactants derived from plants and other natural sources. These natural surfactants enable the ink to be rinsed from walls and fabric using only water without requiring soap or harsh chemicals. The binder composition is also changed to natural substances that facilitate water-based rinsing while maintaining fabric washability through the natural properties of the pigment-binder system
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 ink composition is effectively rinsable from various surfaces with water alone, maintaining color brightness and preventing bleeding, thus addressing the issues of staining and bleeding through paper substrates.
Implementation Method 1
dissolving one or more sugars (e.g., one or more dextrins) in water to form a sugar solution (e.g., a dextrin solution)
Data Source
AI summary
An enhanced washability ink composition has enhanced rinsability and/or washability from fabric, walls, or skin. The composition may comprise about 70 wt % to about 95 wt % water; about 5 wt % to about 35 wt % one or more sugars (e.g., dextrins); about 1 wt % to about 40 wt % one or more optional dye blockers; about 0.1 wt % to about 15 wt % one or more dyes; and one or more optional additives. The rinsable ink composition is usable in a variety of instruments, including markers or pens. A method for making the rinsable ink composition comprises dissolving one or more sugars (e.g., dextrins) in water to form a sugar solution; subsequently adding one or more dyes to the sugar solution to form a sugar-dye solution; and subsequently adding one or more optional dye blockers to the sugar-dye solution.