NASA NTRS · 19670000443
Coded photographic proof paper could serve as convenient densitometer
Abstract
Standard print-out proofing paper, preprinted with an identifying code, serves as convenient densitometer. Exposure to light darkens the paper and gives a measure of the density of the resultant photographic image or the total amount of exposure sustained by the paper.
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Winslow, D. J.. 1967-11-01. Coded photographic proof paper could serve as convenient densitometer. https://ntrs.nasa.gov/citations/19670000443
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