Frederick Charles Derks

Photographic element comprising a red sensitive silver halide emulsion layer

Chemical sensitization of large tabular grain emulsions

Mixed grain emulsions of the same grains having different speed properties for photographic elements

Mixed emulsions of different speed properties using sulfinate and sulfonate compounds

Co-dispersion of sensitizing dyes

Mixed grain emulsions withsame grains but different speeds

Photographisches Element, das eine rotempfindliche Silberhalogenidemulsionsschicht enthält A photographic element comprising a red-sensitive silver halide emulsion layer

Photographisches Element, das eine rotempfindliche Silberhalogenidemulsionsschicht enthält A photographic element containing one red-

Green sensitized tabular grain photographic emulsions

Photographische Emulsionen mit im Grün sensibilisierte tafelförmige Körner Photographic emulsions sensitized in Green tabular grains