Eastman-kodak Company

David T Clarke

Llewellyn J Leyshon

Nigel E Milner

Danuta Gibson

Sharon E Normandin

Arlyce T Bowne

Joseph Bailey

Michael W Crawley

Paul L Stanley

Christopher John Winscom

Linda G Johnston

Katie E Smith

John R Fyson

Philip T Lau

Stanley W Cowan

Christopher B Rider

Christopher P Moore

John Demita Goddard

Peter D Marsden

Peter Hewitson

Jurjen Frederik Winkel

Sean D Slater

Hamish McNab

Jasbir Sidhu

Llewelyn J Leyshon

Richard W Mares

Paul Louis Reginald Stanley

A multiple layer photosensitive element having at least three differently sensitised photosensitive layers on one side of a support, such as a, transparent flexible support, is imagewise exposed according to a desired circuit pattern and developed to form two layers of conductive track patterns from each photosensitive layer, which may then be connected together by forming vias by drilling or in situ generation. The resulting multiple layer conductive element has application in the field of printed circuit board manufacture or as the backplane electronic element of a flexible display device.

Method of forming flexible electronic circuits

The invention relates to a photographic element comprising at least one light-sensitive silver halide emulsion layer having associated therewith in the same dispersion a certain de-aggregating compound at least one heterocyclic cyan dye-forming coupler of a specified formula and an aromatic stabilizer of a particular formula. The combination provides improved image stability.

Photographic elements containing a de-aggregating compound, dye-forming coupler and stabilizer

The invention relates to a photographic element comprising at least one light-sensitive silver halide emulsion layer having associated therewith in the same dispersion a certain de-aggregating hydrogen bond donating and hydrogen bond accepting compound and at least one pyrazole fused ring derivative coupler. The combination provides improved colour reproduction.

Photographic elements containing a de-aggregating compound and dye-forming coupler

Disclosed is a colour photographic element containing one or more cyan dye-forming couplers, a UV absorber and a specific class of stabiliser, and an imaging process used therewith. The element exhibits improved stability.

Photographic elements containing cyan coupler UV absorber and stabilizer

Photographic couplers having improved image dye light stability

Photographic element containing cyan dye-forming coupler

Photographic element with dye-forming coupler and stabilizing compound

Method of forming a photographic color image which comprises imagewise exposing a photographic silver halide color material and processing it with an alkaline processing solution in the presence of a sulphonhydrazide color developing agent and a 3-pyridinol color coupler optionally containing in the 2-position a ballasting group of such size and configuration as to render the coupler non-diffusible in photographic materials thus forming a dye image by reaction of the oxidized color developing agent and the color coupler.

Method of forming a photographic color image

The invention provides a photographic element comprising a light sensitive silver halide emulsion layer containing a cyan dye-forming coupler of formula (I), a phenolic solvent of formula (II) and a bisphenol derivative compound of formula (III): wherein the substituents are as defined herein the specification.

Photographic elements containing cyan dye-forming coupler, coupler

The invention provides a method of transforming a pyrazole compound, comprising cyclizing a 1,5-diaminopyrazole compound having the structure: ##STR1## wherein R.sup.1 is a substituent group; and X is hydrogen, an acyl group, or a heterogroup; in an alkaline solution with carbon disulphide to produce a pyrazolotriazole thione compound having formula (3). ##STR2##

Method of transforming pyrazole compounds

A method of forming a photographic colour image which comprises imagewise exposing a photographic silver halide colour material and processing it with an alkaline developer solution in the presence of a sulphonhydrazide developer and a heteroarylacetonitrile colour coupler thus forming a dye image by reaction of oxidised colour developing agent and the colour coupler. A colour photographic material is also provided having at least two colour-forming units sensitive to different regions of the spectrum, each having a silver halide emulsion layer, characterised in that the material contains in or adjacent said layer, a ballasted photographic colour coupler and a ballasted sulphonhydrazide colour developing agent incorporated therein in droplets of a high boiling solvent and in which the colour coupler is a heteroarylacetonitrile.

Photographic silver halide color materials

A 1-H-pyrazolo-[1,5-b]-1,2,4-triazole having a combination of an arylthio coupling-off group and a tertiary alkyl group attached via its tertiary carbon atom in the 6-position preferably has the general formula: ##STR1## wherein R.sup.1 is a tertiary alkyl group,

Photographic color couplers and photographic materials containing them

Photographic materials having incorporated sulphonyhdrazide color developing agents. Such photographic materials have at least two color-forming units, each of which has a silver halide emulsion layer and a photographic coupler. A ballasted heterocyclic sulphonhydrazide color developing agent is present in the material in droplets of a high boiling point solvent. A method of forming a photographic color image using such materials is also provided.

Photographic silver halide color material having incorporated therein a

Novel pyrazoloazole couplers comprise an aryl or heterocyclic group having, in at least one of the ortho positions to the carbon atom (A) that is bonded to the pyrazoloazole nucleus, a substituent (B) that enables the pyrazoloazole coupler to form a magenta dye that has increased stability and has absorption controllably shifted, that is shifted hypsochromically relative to a dye formed from a similar coupler lacking substituent (B). These couplers are useful in photographic silver halide materials and processes.

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Hemel Hempstead, United Kingdom

David T Clarke