I recently went into a tattoo laser removal office, and was told in my first session that red-pigmented ink colors tend to “stick” in the dermis longer than something like traditional black. Why is this?
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The same reason some regular pigments fade more rapidly than others. They’re made of different substances that have varying levels of resistance to forces that break them down. There are deeper chemical reasons but ultimately it comes down to different materials being more or less stable.
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