sensitized paper for prints that darkens under light and requires treatment to fix an image: largely supplanted at the turn of the century by developing-out paper.
Abbreviation: P.O.P.
Also called printing-out paper.
Origin
1890-95
Examples from the web for printout paper
All types of paper, computer printout paper, and file folders can be deposited in the destruction bins.
Field sketches were made on computer printout paper plotted with dots or small circles.