Abstract: A light-sensitive silver halide photographic film material has been provided, said film material comprising a transparent support and on both sides thereof at least one light-sensitive emulsion layer having spectrally and chemically sensitized tabular silver halide grains rich in silver bromide, further having silver iodide in an amount of less than 3 mole % based on silver, with two flat parallel {111} crystal faces, said grains accounting for a total projective surface of said parallel crystal faces in said emulsion of at least 50%, further having an average aspect ratio of at least 2:1, a grain thickness of from 0.05 up to 0.

Abstract: A method has been described for processing an exposed black-and-white silver halide photographic film material comprising in a hydrophilic light-sensitive layer thereof a binder and silver halide grains being {111} or {100} tabular silver bromo(chloro)iodide or silver chloro(bromo)iodide grains having an average aspect ratio of from 1.2 to 50 and having a silver iodide content of less than 3 mole % based on silver with at least part of it at their grain surface, said method comprising the steps of developing in a developer, fixing in a fixer, rinsing and drying, characterized in that in said developing step the developer comprises an alkali soluble agent having preventing silver dissolution properties, being a mercapto azole compound as presented herein.

Abstract: A film material has been provided with emulsions comprising {111} tabular silver halide grains rich in silver bromide, spectrally sensitive to irradiation in the wavelength range shorter than 420 nm by the presence of at least one blue spectral sensitizer and of at least one azacyanine dye, the formula of which has been given in the description and in the claims. A radiographic screen/film combination or system has also been provided comprising a duplitized film sandwiched between a pair of supporting or self-supporting X-ray intensifying screens, characterized in that i) said pair of supported or self-supporting X-ray intensifying screens essentially consists of luminescent phosphor particles emitting at least 50% and more preferably at least 80% of their emitted radiation in the wavelength range shorter than 420 nm, ii) said film corresponds with the film material disclosed hereinbefore.

Abstract: According to this invention a developer has been disclosed having a low pH value between 9.6 and 11.0, preferably between 9.6 and 10.3, and comprising hydroquinone in an amount from 0 to less than 30 g per liter, an auxiliary developing agent, and as silver halide complexing agents alkali metal sulphite salts, preferably sodium salts, in an amount from 0 to less than 50 g per liter, more preferably to less than 40 g per liter, and thiocyanate salts in amounts from 0.1 to 3 g, more preferably from 0.5 to 2.

Abstract: A radiographic film material is described including a transparent film support having first and second major surfaces coated with a subbing layer, optionally overcoated with an antihalation undercoat. Coated adjacent on each side of the film support is a light-sensitive silver halide emulsion overcoated with a protective antistress layer. The emulsion layer has chemically and spectrally sensitized {111} tabular hexagonal grains or crystals, having silver iodide in an amount of at most 3 mole %, based on silver, covering at least 50% of the total projective surface of all grains, having an average grain thickness of less than 0.30 &mgr;m. The antistress layer, or the optional antihalation undercoat or both includes a N-amino mercapto-triazole compound containing one or more alkali soluble group(s). A radiographic screen/film combination is also described including the film material.

Abstract: A radiographic film material has been provided, comprising a transparent film support having first and second major surfaces coated, apart from a subbing layer and, optionally, a non-light-sensitive hydrophilic layer thereupon, with at least one light-sensitive silver halide emulsion layer overcoated with a protective antistress layer, said emulsion layer(s) having chemically and spectrally sensitized {111} tabular hexagonal core-shell emulsion grains or crystals in an amount of at least 50% of the total projective grain surface of all grains, said grains being composed of a silver bromide core and a silver bromoiodide shell having an average amount over the whole crystal volume of more than 90 mole % of silver bromide, said grains further having a mean equivalent volume diameter of from 0.3 &mgr;m up to 1.0 &mgr;m and an average grain thickness of less than 0.

Abstract: A black-and-white silver halide photographic film material, particularly suitable for use in radiography, has been disclosed, said material comprising a transparent film support having first and second major surfaces coated with a subbing layer, further coated adjacent thereto on one side (for a single-side coated material) or on both sides (for a duplitized material) of said film support and overcoated with a protective antistress layer, a light-sensitive silver halide emulsion layer having chemically and spectrally sensitized {111} tabular hexagonal grains, accounting for at least 50% of the total projective surface of all grains, wherein said film material is coated with a low amount of silver and wherein said protective antistress layer(s)and/or another hydrophilic non-light-sensitive layer comprise(s) a compound according to general formula (I) in an amount of at least 0.5 mmole per mole of coated silver halide, as claimed.

Abstract: A method is disclosed for preparing a light-sensitive silver halide emulsion comprising tabular grains containing colloidal silica sol as a protective colloid, said tabular grains having an average grain thickness of not more than 0.3 &mgr;m, an average aspect ratio of more than 12:1, a total projective area of said tabular grains of at least 50% and a coverage degree by silica sol particles within the range from 50 to 2000%, comprising following steps: precipitating in a reaction medium silver halide by means of a double-jet or triple-jet technique applied to aqueous solutions of silver nitrate and halide salts in colloidal silica having an average particle size in the range from 0.003 &mgr;m to 0.

Abstract: A spectrally-sensitized emulsion has been described, wherein said emulsion comprises {111} tabular silver halide grains having an average aspect ratio of at least 2 with two flat parallel {111} crystal faces accounting for a total projective surface of said parallel crystal faces in said emulsion of at least 50%, characterized in that a site-directing compound is present at said faces, satisfying the general formula I as described herein is present.

Abstract: A light-sensitive silver halide photographic emulsion has been described, said emulsion comprising a colloidally stabilizing binder and {100} tabular silver halide grains containing at least 50 mole % of silver chloride, wherein at least 70% by number of all grains is provided by said tabular grains, exhibiting an average aspect ratio of at least 5 and an average equivalent circular grain diameter of at least 0.3 .mu.m, wherein said tabular grains have an average thickness of less than 0.25 .mu.m for at least 75% by number of all tabular grains.

Abstract: A method is disclosed of processing an exposed black-and-white light-sensitive silver halide photographic material having silver halide, coated in an amount, expressed as an equivalent amount of silver nitrate of less than 6 g/m.sup.2 comprising the steps of developing, fixing, rinsing and drying, making use in the developing step of an ascorbic acid type developer and of an equivalent developer replenisher providing a regeneration amount of less than 150 ml/m.sup.2, characterized in that the said material has a buffering capacity of less than 6 mmole/m.sup.2, wherein said buffering capacity is defined as the amount of alkali, expressed in mmole/square meter, required to bridge across pH differences between the material and the developer.

Abstract: An image-forming system for radiological imaging is described consisting of an intensifying screen comprising on a support at least one layer of a green-light emitting phosphor and, in operative association therewith, a prehardened light-sensitive photographic silver halide film material, comprising a support and on both sides thereof one or more hydrophilic colloid layers having monodisperse cubic silver chloroiodide grains with a mean crystal diameter of from 0.40 .mu.m up to 0.65 .mu.m or {111} tabular silver chloroiodide grains having an aspect ratio of from 5 to 20 and a tabularity from 20 to 200; wherein said grains have been spectrally sensitized in the green wavelength range and have been coated in a total amount of silver per sq.m. of from 6 g up to 8 g, expressed as an equivalent amount of silver nitrate per sq.m.; wherein in the image-forming system silver chloroiodide grains have been chemically sensitized with one or more selenide compound(s) generating silver selenide.

Abstract: A method has been found of preparing a silver halide emulsion comprising silver chlorobromoiodide or silver chloroiodide tabular grains with at least 75 mole % of chloride and from 0.1 up to 3 mole % of iodide, based on silver, further having {111} crystal faces, an average aspect ratio of at least 2:1, with at least 50%, more preferable at least 75% and still more preferable more than 90% of the total projected area of all grains being provided by said tabular grains and with a variation coefficient on sphere equivalent diameter (SED) of said grains being lower than 0.30, more preferably lower than 0.25 and most preferable from 0.05 up to at most 0.

Abstract: A black-and-white silver halide photographic material is disclosed, said material comprising a support and on both sides thereof two light-sensitive emulsion layers and a protective antistress layer as an outermost layer, wherein per side of the support a total amount of silver, expressed as equivalent amount of silver nitrate of at least 5 g is coated, wherein the light-sensitive emulsion layer more close to the said outermost layer is provided with at least one spectrally sensitized silver halide emulsion having tabular emulsion crystals with {111} or {100} major faces, and wherein the emulsion layer more close to the said support is provided with at least one non-spectrally sensitized emulsion having essentially cubic silver halide emulsion crystals, characterized in that the said cubic emulsion crystals or the said tabular emulsion crystals or both have a halide composition including bromide.

Abstract: A method has been described for preparing a gelatinous emulsion having grains rich in silver choride, wherein at least 70%, and more preferred 90%, of the total projected area of all grains is provided by {111} tabular grains having an average aspect ratio of more than 2:1, an average equivalent circular diameter of at least 0.3 .mu.m and an average thickness of from 0.05 to 0.25 .mu.

Abstract: An image-forming system for radiological imaging is disclosed said system consisting of an intensifying screen comprising on a support at least one layer of a green-light emitting phosphor and, in operative association therewith, a prehardened light-sensitive photographic silver halide film material, comprising a support and on both sides thereof one or more hydrophilic colloid layers, said layers being hardened to such an extent that their swelling degree is reduced to less than 200% after immersing said material for 2 minutes in demineralised water of 35.degree. C.; further comprising in at least one of said hydrophilic layers chemically ripened, monodisperse essentially cubic silver chloroiodide grains having a mean crystal diameter of from 0.40 mm up to 0.65 mm; wherein said grains have been spectrally sensitised in the wavelength range between 520 and 580 nm, have a maximum absorption between 540 and 500 nm and have been coated in a total amount of silver per sq.m.

Abstract: A radiographic screen/film combination or system has been provided comprising a duplitized film sandwiched between a pair of supporting or self-supporting X-ray intensifying screens, characterized in that i) said pair of supported or self-supporting X-ray intensifying screens essentially consists of luminescent phosphor particles emitting at least 50% and more preferably at least 80% of their emitted radiation in the wavelength range shorter than 380 nm, as e.g. a niobium and gadolinium doped, monoclinic M, yttriumtantalate (MYT) phosphor corresponding to formula IYTaO.sub.4 :Gd:Nb (I),ii) said film comprises {111} tabular silver halide grains rich in silver chloride, spectrally sensitive to irradiation in the said wavelength range shorter than 380 nm by the presence of at least one azacyanine dye as a spectral sensitizer.

Abstract: A method has been disclosed of processing an image-wise exposed light-sensitive black-and-white silver halide photographic material comprising a support coated on one or both sides thereof with hydrophilic layers, wherein at least one of said layers comprises one or more emulsions having tabular silver halide crystals rich in silver chloride, said method comprising the steps of developing, fixing, rinsing and drying, further characterized in that said developing step proceeds in a black-and-white developer comprising one or more organic compounds inhibiting development, more preferably one or more benzotriazole compounds, and in that said developer is substantially free from bromide ions in favor of a low fog level, a high speed and a sufficiently high covering power of the developed tabular grains.

Abstract: A method is disclosed of hardener-free processing a forehardened silver halide photographic material comprising a film support and on one or both sides thereof at least one silver halide emulsion layer characterized in that(1) each silver halide emulsion layer comprises spectrally sensitized cubic silver chloride or silver bromochloride grains having not more than 25 mole % of bromide in a total amount of coated silver expressed as the equivalent amount of silver nitrate in the range of from 2.5 to 4 g/m.sup.2 ;(2) the forehardened material has a water absorption of less than 4 grams per gram of gelatin, wherein said water absorption has been determined by making the difference by weight of the material when dry and when having been dipped in demineralized water of 25.degree. C. during 3 minutes followed by squeezing off the superficial water;(3) hardener-free processing includes development with a developing solution comprising thiocyanate ions in amounts from 10.sup.-3 up to 10.sup.-2 molar.

Abstract: A light-sensitive silver bromide or silver bromoiodide emulsion is provided, comprising silver bromide or silver bromoiodide tabular triangular grains, said tabular triangular grains having an average grain thickness of less than 0.3 .mu.m, an average crystal diameter of at least 0.6 .mu.m; an average aspect ratio of at least 2:1; a variation coefficient of less than 40%, said grains accounting for a total projective area of at least 30%; characterized in that the thickness ratio of triangular tabular grains to hexagonal tabular grains is from 1.3 to 0.7.