Abstract: A device for determining ionic activity composed of, as essential components, plural pairs of ion-selective solid electrodes each pair having two electrodes (one electrode on each of two sides) and each pair having a different ion-selective layer; two liquid distribution porous members, each member disposed over all the electrodes of each said side of the plural pairs; and a porous capillary bridge disposed on or between the liquid distribution porous members. The bridge can be in liquid contact with all the electrodes through the liquid distribution porous members and achieve electrical conduction between two electrodes in each pair after spotting a test solution and a reference solution. The device preferably further comprises a support frame and a cover having two apertures for liquid spotting. The device can simultaneously determine ionic activities of a plurality of different ions in a test solution, such as whole blood, plasma, serum, urine, etc.

Abstract: A process for forming an electrically conductive film by exposing to actinic radiation a coating that contains a nonionic electron donating compound and a halogen-substituted polymer having film-forming properties on a substrate, thereby forming a charge transfer complex in said halogen-substituted polymer in said coating.

Abstract: A lithographic type diffusion transfer developing composition which provides high contrast images having sharp toe-gradation for developing silver halide light-sensitive materials contains at least one amine represented by one of the following general formulae (I), (II) or (III):H.sub.2 N-C.sub.n H.sub.2n -X (I) ##STR1## X, X', R.sub.1, n and m are defined in the specification. The process of developing using such a composition is also disclosed.

Abstract: A method for producing a multilayer printing plate comprising image-wise exposing and developing a light-sensitive printing plate material which comprises a support having an oleophilic surface having a hydrophilic metal layer thereon, the hydrophilic metal layer having thereon at least one silver halide emulsion layer either directly or on at least one subbing layer on the hydrophilic metal layer, to form a silver image resist image corresponding to the image-wise exposure by subjecting the printing plate material to a process including baking, removing the hydrophilic metal layer at non-resist image areas to uncover the oleophilic surface thereunder, and removing the resist image, or a method for producing a multilayer printing plate comprising image-wise exposing and developing a light-sensitive printing plate material which comprises a support having a hydrophilic surface having thereon at least one silver halide emulsion layer either directly or on at least one subbing layer on the hydrophilic surface to

Abstract: A light-sensitive lithographic printing plate forming material comprising a support having a hydrophilic surface provided in order with a layer of a positive-working light-sensitive resin composition capable of forming an oleophilic image, and a tannable light-sensitive silver halide emulsion layer containing a tanning-developing agent, and a process for preparing a lithographic printing plate using the same is disclosed.

Abstract: A printing plate having an improved durability which has a support having an oleophilic surface and a hydrophilic diffusion transfer image-receiving layer containing nucleus substance for the physical development and having between the oleophilic and hydrophilic layers at least one of gelatin or nitrocellulose.

Abstract: A silver halide photographic material comprising an aluminum support having thereon an anodized aluminum oxide layer and a light sensitive silver halide layer containing a silver halide developing agent thereon with a subbing layer containing at least either a silver halide or a developing agent suitable for a silver halide in an amount less than the quantity contained in the light-sensitive layer, which can be used to produce a relief image possessing high printing durability by successively receiving an image-wise exposure, an alkaline solution development, a washing-off and a drying.

Abstract: Presensitized printing plates for lithographic printing which comprise an aluminum support having an anodically oxidized aluminum oxide film thereon and a light-sensitive layer containing internal latent image type silver halide grains which are not fogged on the anodically oxidized aluminum oxide film on the support.

Abstract: A process for intensifying a silver image formed photographically to obtain a non-silver metal image of high optical density comprising treatment with a non-silver physical developer solution containing (1) at least one of an amine borane compound and a borohydride compound, (2) at least one of an amine compound and an ammonium compound, and (3) a compound of a non-silver metal, within a specified temperature range and the non-silver physical developer solution used therein.

Abstract: Developer compositions for diffusion transfer photographic materials containing amino compounds and imidazole compounds are used in a diffusion transfer photographic process for obtaining litho-type positive images of high contrast and of good short toe effect, the amino compounds being represented by the following formula I and the imidazole compounds by the following formula II:formula I(a) NH.sub.2 --C.sub.m H.sub.2m --Xwherein X represents a hydrogen atom, hydroxyl group, carboxyl group or amino group, and m represents a natural number of 0-12, but X represents a hydroxyl group when m is 0, ##STR1## wherein X and X' represent each a hydrogen atom, hydroxyl group, carboxyl group or amino group, and m and each represents a natural number of 0-12, but X and/or X' represents a hydroxyl group when m and/or n is 0. ##STR2## WHEREIN Y represents an oxygen atom, --CH.sub.

Abstract: A process for producing a printing plate comprising imagewise exposing a light-sensitive material comprising a support with a hydrophilic surface and having thereon an unhardened silver halide emulsion layer, developing the imagewise exposed light-sensitive material with a non-tanning developer, fogging the remaining silver halide, developing the fogged remaining silver halide with a tanning developer to thereby simultaneously harden the emulsion layer at the areas developed, and removing the unhardened emulsion layer, whereby an oleophilic tanning relief image is formed.

Abstract: A photosensitive printing plate having excellent reproducibility of an original of continuous tone comprising a support having an oleophilic surface and formed thereon a diffusion transfer hydrophilic image-receiving layer containing nucleating materials for physical development and a photosensitive silver halide emulsion layer, said image-receiving layer containing an alginate or an image-receiving subsidiary layer containing an alginate present between said image-receiving layer and said photosensitive emulsion layer.

Abstract: A printing plate having halftones and lines is produced by exposing a photosensitive printing plate material comprising a support having an oleophilic surface, a hydrophilic layer formed thereon and a layer of a direct positive-type photosensitive silver halide emulsion formed on top of the hydrophilic layer through a positive original, developing the exposed material to form a silver image in the emulsion layer, subjecting the developed material to an etch bleaching treatment to remove the hydrophilic layer at portions corresponding to the silver image and to reveal the oleophilic surface, and removing the emulsion layer at a portion on which the silver image is not formed, thereby to reveal said hydrophilic layer. The printing plate can given a number of good quality impressions from the outset of printing, and smeared impressions do not result during continued printing operation.