aftertreatment

[ af-ter-treet-muh nt, ahf- ]
/ ˈæf tərˌtrit mənt, ˈɑf- /

noun

a chemical treatment to which a fabric is subjected immediately after being dyed, for increasing the fastness of the color.

Origin of aftertreatment

First recorded in 1825–35; after + treatment
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019