E.i. Dupont De Nemours and Company

Alden D West

Dietrich M Fabricius

Evan D Laganis

Mark D Franke

Richard J Legg

Anna E Doyle

An improved process for manufacturing a spectrally sensitized photographic element comprising the combination of ultrafiltration of silver halide grains in combination with a supersensitizing additive consisting of ##STR1## wherein D.sup.+ is Na.sup.+, K.sup.+, Li.sup.+, NH4.sup.+ ; n is 1-5; m is 1-10.

Process for preparation of a photographic element

Sulfoalkyl substituted indolenine dyes that absorb infrared radiation and photosensitive elements containing said dyes are disclosed. These dyes are useful as antihalation dyes in infrared sensitive photographic elements which show dye low stain. These dyes are represented by the following structure: ##STR1## wherein X is F, Cl, or Br; R is a hydrocarbon moiety containing from two to about five carbon atoms; and Y is a cation. In a preferred embodiment X is Cl. In a more preferred embodiment R is --(CH.sub.2).sub.3 -- or --(CH.sub.2).sub.4 --.

Light sensitive element having an antihalation layer

Aqueous soluble infrared antihalation dyes

A photographic element useful as a laser medical recording film, for example, is described. This element has near infrared sensitivity and is characterized by having an absorbing layer with an absorbing dye as described herein present as an antihalation backing layer.

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Hendersonville, NC, United States of America

Alden D West