HALOGEN-SILVER PHOTOGRAPHIC MATERIAL WITH INTERNAL MASKING Russian patent published in 1995 - IPC

FIELD: photography. SUBSTANCE: this photographic material is composed of base with two emulsion layers arranged on one or both sides of it produced from negative halogen-silver emulsions. One of emulsion layers is additionally injected with colorless color-forming component creating purple pigment with development and the second layer is additionally injected with masking color-forming component of purple color creating light blue pigment with development or one of emulsion layers has in addition colorless color-forming component creating yellow pigment and the other layer has masking color-forming component of yellow color creating purple pigment with development. In this case there is observed expansion of range of reconstructed spatial frequencies which is displayed in shift of increment of difference between maximum and minimum optical densities ΔD by frequency scale into region of high spatial frequencies depending on change of relation between exposure behind light filter while intermediate image is exposed on to registration material with ΔD from 0 up to 20 mmmm^-1. EFFECT: expanded range of reconstructed spatial frequencies. 3 tbl