that is able or tends to make permanent, prevent fading, etc.
Origin of fixativefix + -ative
a substance that makes something permanent, prevents fading, etc., as a mordant or a preservative used in microscopy
Something that fixes, protects, or preserves, especially:
a. A liquid preservative applied to artwork, such as watercolor paintings or charcoal drawings.
b. A solution used to preserve and harden fresh tissue for microscopic examination.
c. A liquid mixed with perfume to prevent rapid evaporation.