Note on the Evaluation of Photographic Speed from Sensitometric Data

A method of ascertaining the gradient speed of a photographic material without the use of special gradient measuring instruments is pointed out. The derived formula shows the relation which must exist between density and log exposure at the value of exposure which is the reciprocal of the speed.

Print ISSN

0097-5834

Published

1944-07

Content type

Original Research

DOI

10.5594/J08428