Any process that activates or increases the rate or extent of the chemical reactions and pathways resulting in the formation of melanin.
Synonyms:
exact_synonym:
positive regulation of melanin anabolism; positive regulation of melanin biosynthesis; positive regulation of melanin formation; positive regulation of melanin synthesis; up regulation of melanin biosynthetic process; upregulation of melanin biosynthetic process
narrow_synonym:
activation of melanin biosynthetic process; stimulation of melanin biosynthetic process