Resolving power determination by direct observation of unprocessed film by reflected light

Measurement of resolving power of an emulsion is usually determined by an extensive exposure and development series. Resolving power is reported at the optimum value and exposure and density are reported also. Such a procedure is wasteful and time consuming. This paper explores the determination of resolving power by the observation of a reflected image of a resolution target on unprocessed. The reflection from the gelatin support was higher than that of the silver halide grains and thereby masked the reflected image from the grains. This phenomenon was observed over the entire range tested. The maximum obtained was 746 lines per millimeter