Eastman-kodak Company

Peter D Marsden

Edward C Glover

John R Fyson

Peter J Twist

Gareth B Evans

Erika M Sato

James I Dunlop

Anthony Earle

Michael W Crawley

David T Clarke

Joseph Bailey

Martyn S Glover

David M Henson

Andrew D Grimsey

John Kenneth Kempster

Jasbir Sidhu

John Arthur Bee

John Morgan

Roger Baretll

A method of processing an imagewise exposed photographic silver halide material which includes a redox amplification dye image-forming step and a bleach step using an aqueous solution of hydrogen peroxide or a compound capable of releasing hydrogen peroxide.

Photographic bleach compositions

A method of photographic color processing which comprises a bleach step wherein the bleach solution comprises hydrogen peroxide, or a compound which releases hydrogen peroxide, and halide ions and which has a pH in the range of 5 to 11 and bleach solutions therefore.

Photographic processing method using bleach solution comprising hydrogen

A method of processing an imagewise exposed photographic silver halide colour material by a redox amplification method in which the colour material is treated with a colour developing agent in the presence of an oxidant in which a processor is used which comprises means for applying a relatively small volume of processing solution to an imagewise exposed silver halide material and in which the relatively small volume of solution is supplied from a reservoir of relatively large volume and, while processing, the processing solution being used is isolatable from said reservoir and, wherein either a colour developer solution without oxidant or an oxidant solution without colour developing agent is held in the reservoir and wherein the additional oxidant (or colour developing agent) respectively needed for amplification is introduced into the processing solution while it is isolated from said reservoir and wherein the used developer/amplifier so-formed is discarded into said reservoir after use where any unused introduced oxidant (or colour developing agent) is destroyed by a compound present in the reservoir.

Method of photographic processing

A color image can be obtained from a color photographic element by multiple color development steps. The first color development is carried out in the usual manner after imagewise exposure. The second color development step is carried out after bleaching with a rehalogenating bleaching agent, and is used to develop only rehalogenated silver halide. This specific development is possible by either using a chloride rehalogenating agent in the bleaching solution, using a sulfite fixing agent before bleaching, or by fogging the element between bleaching and the second color development step.

Method of forming a photographic color image

Method and apparatus for photographic processing solution replenishment

A method of processing an imagewise exposed photographic silver halide colour material by a redox amplification method in wherein colour developing solution is applied to the material in the presence of atmospheric oxygen and a hydroxylamine compound of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are each an alkyl or aryl groups either of which may be substituted, and wherein the colour developer solution is agitated sufficiently for redox amplification to occur.

Photographic processing apparatus

Method and apparatus for photographic processing

Photosensitive photographic silver halide color materials

The invention provides a photographic element comprising a paper substrate with a polyolefin coating provided on at least one surface, a hydrophilic colloid layer on the polyolefin coating, and at least one light sensitive silver halide emulsion above the hydrophilic colloid layer, wherein said hydrophilic colloid layer comprises a removable antihalation material and from about 20 to 80 percent by weight of a white pigment, and from about 15 to 35 percent by weight of hollow microspheres having a diameter of from about 0.1 to about 1 um.

Photographic paper

The invention provides a photographic element comprising a paper substrate with a polyolefin coating provided on at least one surface, a hydrophilic colloid layer on the polyolefin coating, and at least one light sensitive silver halide emulsion above the hydrophilic colloid layer, wherein said hydrophilic colloid layer comprises a removable antihalation material and from about 20 to 80 percent by weight of a white pigment, and from about 15 to 35 percent by weight of hollow microspheres having a diameter of from about 0.1 to about 1 .mu.m.

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North Harrow, United Kingdom

Peter D Marsden