No, the dyes used in different markers are generally not the same.
Different marker manufacturers often employ unique dye formulations for several reasons:
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Proprietary Formulations: Companies develop their own ink formulas, including dyes, to create distinct characteristics such as color intensity, vibrancy, lightfastness, and blending capabilities. These formulas are often kept secret to maintain a competitive advantage.
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Special Effects: Some dyes are selected to produce specific visual or physical effects, like fluorescence, shimmer, or erasability. Different companies may aim for different special effects, necessitating the use of different dye types.
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Avoiding Infringement: Companies might intentionally use different dyes to avoid accusations of copying another company's product or infringing on existing patents.
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Cost Considerations: The cost of various dyes can differ significantly. A company might opt for a less expensive dye to reduce manufacturing costs, while another might prioritize quality and use a more expensive, high-performance dye.
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Application and Surface: The intended use of the marker and the type of surface it's designed to write on can also influence dye selection. For example, dyes used in permanent markers intended for non-porous surfaces will differ from those in water-based markers designed for paper.
In summary, diverse dye formulations are used in different markers because of proprietary considerations, special effects requirements, the desire to avoid infringement, cost management, and specific application requirements.