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Questions asked by users might not always be phrased in the clearest way.
Two properties of a good dye (in the context of chemistry) are:
- Substantivity - ability to adhere to substrates
- Fastness - ability to withstand external influences (such as light, heat, washing, etc.)
References:
- Morrison, Robert Thornton, and Robert Neilson Boyd. _Organic Chemistry._ 6th ed., Allyn and Bacon, 1992.
- Atkins, Peter W., and Julio de Paula. _Atkins' inorganic chemistry._ 8th ed., Oxford University Press, 2006.