Printing Sheet Plaster Layer Ink Depth UV Protection
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Solution Overview
Problem
Conventional printing papers used for ink-jet and laser printers fail to produce images with depth like paintings and lack protection from ultraviolet rays and ozone, leading to color fading over time.
Innovation Solution
A printing sheet with a semi-solidified plaster precursor layer containing calcium hydroxide and calcium carbonate, which reacts with carbonic acid gas to form a porous and protective plaster layer, allowing for deep ink penetration and long-lasting vivid images with a rugged appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional printing papers are used for ink-jet printers, then the ink is quickly absorbed and vivid images are formed, but the images lack depth like paintings and colors fade over time due to lack of protection from ultraviolet rays and ozone
Solution Approach 1:
The printing sheet uses a composite structure combining a paper substrate with a plaster layer containing calcium carbonate and calcium hydroxide. This composite material provides both the ink absorption capability of traditional printing paper and the protective, painting-like surface properties of plaster, resolving the contradiction between durability and aesthetic depth.
Solution Approach 2:
The plaster layer is designed with a porous structure that allows ink to penetrate deeply into the material, creating images with depth and dimension similar to paintings. The porosity enables both deep ink absorption for aesthetic effect and provides a matrix for protecting the ink from environmental degradation.
2Shape
If a plaster layer is applied to create painting-like depth, then images gain rugged appearance and depth, but the structure becomes more complex and requires preservation measures
Solution Approach 1:
The plaster layer contains calcium hydroxide that automatically carbonates upon exposure to atmospheric carbon dioxide, forming a protective calcium carbonate layer. This self-service mechanism provides protection against ultraviolet rays and ozone without requiring additional complex preservation systems, reducing overall device complexity while maintaining image depth.
Solution Approach 2:
The plaster layer is pre-formed with calcium hydroxide and binder materials during manufacturing, prepared in advance to provide both the desired rugged appearance and built-in protection capabilities. This preliminary preparation eliminates the need for post-processing preservation measures, simplifying the overall structure.
3Reliability
If plaster precursor containing calcium hydroxide is used, then the plaster carbonates and solidifies to protect ink, but the manufacturing process becomes more complex
Solution Approach 1:
The calcium hydroxide in the plaster layer automatically carbonates when exposed to atmospheric carbon dioxide, self-converting to calcium carbonate that provides ink protection. This self-service chemical transformation eliminates the need for separate curing or protection steps, simplifying manufacturing while ensuring reliable ink protection and color fastness.
Solution Approach 2:
The invention utilizes the chemical parameter change of calcium hydroxide converting to calcium carbonate through carbonation. This parameter change provides a simple manufacturing approach where the protective layer forms automatically upon exposure to air, avoiding complex manufacturing processes while ensuring durable ink protection.
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 enables the creation of images with a painting-like depth and durability, protecting the ink from ultraviolet rays and ozone, preventing color fading and maintaining image quality over extended periods.
Implementation Method 1
a printing layer which is formed on a surface of the substrate sheet and contains a plaster precursor therein, characterised in that: the plaster precursor comprises calcium carbonate and calcium hydroxide
Implementation Method 2
allowing for deep ink penetration
Implementation Method 3
protecting the ink from ultraviolet rays and ozone, preventing color fading
Data Source
Figure 1
AI summary
A printing sheet of this invention includes a substrate sheet and a printing layer which is formed on a surface of the substrate sheet and contains a semi-solidified plaster precursor. Printing is effected on the surface of the printing layer by using, for example, an ink-jet printer. Upon effecting the printing by using the printing sheet, a highly durable image can be vividly formed featuring rugged feeling and painting-like deepness.