developing-out paper
[ dih-vel-uh-ping out, -vel- ]
/ dɪˈvɛl ə pɪŋ ˈaʊt, -ˌvɛl- /
noun Photography.
a sensitized printing paper requiring development in order to bring out the image. Abbreviation: D.O.P.
Compare
printout paper.
Origin of developing-out paper
First recorded in 1915–20