Answer: fixatif

AnswerCrossword Clue
fixatifa substance for preserving paintings or drawings, also FIXATIVE
fixatifserving to fix; making fixed or permanent
fixatifsubstance that retards evaporation, as in the manufacture of perfume
fixatiffixative substance, as a gummy liquid sprayed on a drawing to prevent blurring, or a solution for killing, hardening, and preserving material for microscopic study
fixatifchemical substance, as sodium thiosulfate, used to promote fixation