3D Printing Cosmetic Agent Antioxidant Interference
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Solution Overview
Problem
Antioxidants in 3D printing build materials can degrade cosmetic agents, causing unintended color changes in the final printed parts, as they reduce the dyes and alter their intended colors.
Innovation Solution
Incorporating an oxidizing agent into the cosmetic agent or using an oxidizing fluid in combination with the cosmetic agent to selectively react with antioxidants, preventing dye reduction and maintaining the desired color by ensuring the oxidizing agent reacts with the antioxidants rather than the dye.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If antioxidants are added to build material to prevent oxidation and stabilize the material, then the stability and shelf life of the build material is improved, but the antioxidants reduce the dyes in cosmetic agents causing unintended color changes
Solution Approach 1:
An oxidizing agent is introduced as an intermediary substance in the cosmetic agent formulation. This oxidizing agent acts as a mediator that reacts with the antioxidant in the build material before the antioxidant can reduce the dye. The oxidizing agent effectively transfers the harmful reducing effect from the dye to itself, preserving the dye's color while allowing the antioxidant to remain in the build material for stabilization.
Solution Approach 2:
The chemical state of the cosmetic agent is changed by adding an oxidizing agent that alters the redox environment. By changing the oxidation-reduction parameters of the cosmetic agent formulation, the dye is protected from reduction by the antioxidant. The oxidizing agent maintains an oxidizing environment that prevents the color-changing reduction reaction.
2Reliability
If antioxidants are used to protect build material from degradation, then the reliability of the 3D printing process is improved, but the dyes in cosmetic agents are reduced causing discoloration
Solution Approach 1:
The harmful reducing effect of the antioxidant is converted into a beneficial interaction by introducing an oxidizing agent. The oxidizing agent willingly undergoes oxidation itself, converting the potential harm (reduction of dye) into a controlled reaction where the oxidizing agent is consumed instead. This transforms the antioxidant's harmful effect on color into a controlled redox reaction that preserves color accuracy while maintaining process reliability.
3Illumination intensity
If cosmetic agents are applied to colored regions of build material, then the aesthetic quality of the printed part is improved, but the antioxidants in the build material cause the dyes to change color
Solution Approach 1:
The oxidizing agent provides preliminary anti-action by being present in the cosmetic agent before application to the build material. It proactively counteracts the antioxidant's reducing effect before the dye can be reduced and discoloration can occur. This preliminary protective action ensures color stability is maintained from the moment the cosmetic agent contacts the build material.
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 use of oxidizing agents effectively prevents the reduction of dyes by antioxidants, ensuring the printed parts retain their intended colors, as demonstrated by maintaining black color in examples where other methods resulted in brown discoloration.
Implementation Method 1
an oxidizing agent to react with an antioxidant in a build material to reduce reduction of the dye in the presence of the antioxidant
Implementation Method 2
The oxidizing agent(s) is capable of absorbing radiation and converting the absorbed radiation to thermal energy, which in turn fuses the build material
Data Source
AI summary
Examples of a cosmetic agent are for three-dimensional (3D) printing. In an example, the cosmetic agent includes a dye, an oxidizing agent, and a solvent. The oxidizing agent is to react with an antioxidant in a build material to reduce reduction of the dye in the presence of the antioxidant.