proof print
n.
A photographic print, generally supplied with similar images, supplied to a client to aid in the selection of the version that will be used for the final copy.
Notes
Proof prints are often unfinished in the sense that they may not have been retouched or the exposure may be imperfect. In the 20th century, studio photographers often provided customers with proof prints on unfixed printing-out paper. Over time, the image would degrade, taking on an overall bronze cast, forcing customers to purchase prints they wanted to keep.
