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Two particular techniques producing high quality thick phase holograms in silver halide emulsions are the fixation free rehalogenating bleaching and the silver halide sensitized gelatin. In this work we compare these two particular techniques applied to three different red sensitive emulsions: Agfa 8E75 HD, BB-640 and PFG-01. The differences between the emulsions influence in the particular experimental conditions which yield to holograms performing high diffraction efficiencies. In this work these differences are analyzed and also its influence on the final hologram.This work was financially supported by the Comisión Interministerial de Ciencia y Tecnología (CICYT) of Spain (project MAT2000-1361-C04-04) and by the Oficina de Ciencia y Tecnología, Generalitat Valenciana, Spain (project GV01-130)

Thick phase holographic gratings recorded on Agfa 8E75 HD, BB-640 and PFG-01 red sensitive silver halide materials