Minnesota Mining and Manufacturing Company

Giorgio Spazzapan

Ivano Delprato

Marco Bucci

Alberto Valsecchi

Renzo Torterolo

Soonkun Kang

The invention is directed to an antistatic polymeric film base comprising a polymeric film having coated on at least one side thereof an antistatic layer comprising the reaction product of (1) a water-soluble, electrically conductive polymer containing carboxylic groups and (2) a water-soluble polymer containing oxazoline groups, and to a photographic element comprising at least one silver halide emulsion layer on said antistatic polymeric film base. This antistatic layer may be present as a backing layer on the side of the film base opposite the silver halide emulsion layer, as a subbing layer between the film base and the emulsion layer in a single or double side coated photographic element, and/or as a subbing layer between the film base and a different backing layer.

Antistatic film bases and photographic elements comprising said

An infrared sensitive silver halide photographic element is disclosed comprising a support and at least one silver halide emulsion layer spectrally sensitized to the infrared portion of the electromagnetic spectrum. In particular, an infrared sensitive color photographic element, capable of providing full color images without exposure to corresponding visible radiation, is disclosed, said element comprising at least three silver halide emulsion layers on a substrate, each associated with different photographic color image forming materials, such as color couplers capable of forming dyes of different colors upon reaction with an oxidized color photographic developer, diffusing dyes, bleachable dyes, or oxidized leuco dyes. The three emulsion layers are sensitized to three different portions of the electromagnetic spectrum with at least two layers sensitized to different regions of the infrared region of the electromagnetic spectrum. The infrared sensitive element is characterized in that at least one infrared sensitized emulsion layer is associated with a 1-aryl-5-mercaptotetrazole compound substituted in the aryl group by at least one electron-attracting group. The infrared sensitive photographic element has high sensitivity to infrared radiation and undergoes less change in sensitivity during storage.

Infrared sensitive silver halide photographic elements

An infrared sensitive silver halide photographic element is disclosed comprising a support and at least one silver halide emulsion layer spectrally sensitized to the infrared portion of the electromagnetic spectrum. In particular, an infrared sensitive silver halide color photographic element, capable of providing full color images without exposure to corresponding visible radiation, is disclosed, said element comprising at least three silver halide emulsion layers on a substrate, each associated with different photographic color image forming materials, such as color couplers capable of forming dyes of different colors upon reaction with an oxidized color photographic developer, diffusing dyes, bleachable dyes, or oxidable leuco dyes. The three emulsion layers are sensitized to three different portions of the electromagnetic spectrum with at least one layer sensitized to radiation within the infrared region of the electromagnetic spectrum. The infrared sensitive element is characterized in that at least one infrared sensitized emulsion layer is associated with a 5-arylamino-1,2,3,4-thiatriazole compound wherein the aryl group has at least one electron-attracting group substituent. The infrared sensitive color photographic element having an effective amount of said compound therein has high sensitivity to infrared radiation and undergoes less change in sensitivity during storage.

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Savona, Italy

Giorgio Spazzapan