chrome alum

/kroʊm ˌæləm/
IPA guide

Definitions of chrome alum
  1. noun
    a violet-colored salt used in hide tanning and as a mordant in dyeing
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    type of:
    mordant
    a substance used to treat leather or other materials before dyeing; aids in dyeing process
    salt
    a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)
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