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As for the naming of solvent dyes a standardized pattern is followed. In the pattern, the first word is always ‘solvent’ which is followed by the dye color and then a distinguishing number. For example, the varied shades of red are segregated by the distinct number that comes after the shade name like ‘Solvent Red 49’, ‘Solvent Red 1’, and ‘Solvent Red 24’ and so on. Another example of the shade red occurring in another type of dye is Pigment Red 48 which is an azo derivative from naphthalene.
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