公开(公告)号：US5236815A

公开(公告)日：1993-08-17

申请号：US923483

申请日：1992-08-03

申请人： Jean-Marie O. Dewanckele ,  Richard A. Ooms ,  Marc B. Graindourze ,  Piet Kok

发明人： Jean-Marie O. Dewanckele ,  Richard A. Ooms ,  Marc B. Graindourze ,  Piet Kok

IPC分类号： G03C5/29 ,  C07D209/08 ,  C07D231/56 ,  C07D249/18 ,  G03C1/06 ,  G03C1/34 ,  G03C1/485 ,  G03C1/76 ,  G03C5/305

CPC分类号： C07D249/18 ,  G03C1/48538

摘要： A new class of photographic masked stabilizers is disclosed showing following general chemical formula (Ia) or (Ib): ##STR1## wherein X and Y each independently represent N or CR, R being hydrogen or lower alkyl,Z represents a lower alkyl group, a nitro group, a halogen atom or hydrogen, andM represents a positive counterion, preferably an alkali cation, ammonium or substituted ammonium.The compounds are demasked by hydrolysis under alkaline conditions. They can be incorporated in a developing solution or in a photographic material, preferably in the backing layer. They show an enhanced solvability in water compared to the corresponding unmasked stabilizers.A preferred compound is 1-(2-sulphonatobenzoyl)-5-nitroindazole trimethylamine, sodium or potassium salt.

公开(公告)号：US5206123A

公开(公告)日：1993-04-27

申请号：US835856

申请日：1992-02-18

申请人： Richard A. Ooms ,  Piet Kok

发明人： Richard A. Ooms ,  Piet Kok

IPC分类号： G03C5/29 ,  G03C5/30 ,  G03C5/305

CPC分类号： G03C5/305

摘要： A method for high contrast development of an image-wise exposed photographic element comprising a support and at least one silver halide emulsion layer, which method comprises contacting said exposed element in the presence of a hydrazine compound with an aqueous alkaline developing solution which has a pH between 10 and 13 and contains a dihydroxybenzene developing agent a 3-pyrazolidinone or an aminophenol developing agent sulphite ions and a contrast promoting amount of an amino compound characterized in that said developing solution further contains an aprotic solvent corresponding to general formula (I) or (II) : ##STR1## wherein R.sub.1 represents alkyl, substituted alkyl, alkylamino or substituted alkylamino, andR.sub.2 and R.sub.3 each independently represent alkyl substituted alkyl orwherein R.sub.1 together with R.sub.2 represent the necessary atoms to form together with the carbon and the nitrogen atom respectively to which they are attached, a heterocyclic ring, and R.sub.3 represents alkyl substituted alkyl or hydrogen;R.sub.4 and R.sub.5 each independently represent, alkyl, substituted alkyl, alkylamino or substituted alkylamino orR.sub.4 together with R.sub.5 represent the necessary atoms to form together with the sulphur atom to which they are attached a heterocyclic ring and n is 1 or 2.Preferred aprotic solvents are N,N'-dimethylacetamide, N-methyl-2-pyrrolidinone tetramethylurea, 1,3,-dimethyl-2-imidazolidinone, dimethylsulphoxide and tetramethylenesulphon.

公开(公告)号：US5141843A

公开(公告)日：1992-08-25

申请号：US675518

申请日：1991-03-27

申请人： Richard A. Ooms ,  Piet Kok ,  Jean-Marie O. Dewanckele

发明人： Richard A. Ooms ,  Piet Kok ,  Jean-Marie O. Dewanckele

IPC分类号： G03C5/29 ,  C07D257/04 ,  G03C5/30 ,  G03C5/305

CPC分类号： C07D257/04 ,  G03C5/305

摘要： A developer liquid suited for use in development of photographic silver halide emulsion layer materials which liquid contains:1) hydroquinone or a substituted hydroquinone as sole developing agent or said hydroquinone as main developing agent in combination with an auxiliary developing agent in an amount less than 10 mole % with respect to the main developing agent,2) an inorganic compound yielding free sulphite ions in an amount of at least 5 grams per liter,3) an organic anti-fogging agent corresponding to the following general formula (Z): ##STR1## wherein: X.sup.2 represents an alkyl group or an aryl group including said groups in substituted form or an amino group including said group in substituted form;the amount of anti-fogging agent being in the range of 50 mg to 1 g per liter,4) a polymer containing a plurality of alkylene oxide units, and5) the necessary alkaline material to have in said liquid a pH of at least 10.5. Optional additives can also be present in the developing liquid.

摘要翻译： 一种适合用于显影卤化银乳剂层材料的显影剂液体，其液体包含：1）氢醌或取代的氢醌作为唯一显影剂或所述氢醌作为主要显影剂，与辅助显影剂的组合少于10 相对于主显影剂的摩尔％，2）产生至少5克/升的游离亚硫酸根离子的无机化合物，3）对应于以下通式（Z）的有机防雾剂：

公开(公告)号：US4710451A

公开(公告)日：1987-12-01

申请号：US843256

申请日：1986-03-24

申请人： Richard A. Ooms

发明人： Richard A. Ooms

IPC分类号： G03C1/035 ,  G03C1/005 ,  G03C1/42 ,  G03C5/30 ,  G03C5/24 ,  G03C1/06 ,  G03C1/34

CPC分类号： G03C1/42 ,  G03C5/30

摘要： A high contrast silver metal image can be formed in an exposed photographic silver halide emulsion layer material, the silver halide of which is at least 90 mole percent silver bromide, with the balance being silver chloride and/or silver iodide by developing the same in a developing medium in the presence of hydroquinone as sole developing agent, a large amount of sulphite derived from an inorganic sulphite compound, a nitro-indazole anti-fogging agent, and a polyoxyethylene polymer, and an inorganic alkaline compound to impart to the medium a pH of at least 10.5 provided the amounts of these ingredients meets certain requirements.

摘要翻译： 可以在暴露的照相卤化银乳剂层材料中形成高对比度的银金属图像，其卤化银为至少90摩尔％的溴化银，余量为氯化银和/或碘化银，通过在 在氢醌作为唯一显影剂存在下的显影介质，大量衍生自无机亚硫酸盐化合物的亚硫酸盐，硝基吲唑防雾剂和聚氧乙烯聚合物，以及赋予介质pH的无机碱性化合物 至少10.5，只要这些成分的数量满足某些要求。

公开(公告)号：US5266442A

公开(公告)日：1993-11-30

申请号：US808644

申请日：1991-12-17

申请人： Richard A. Ooms

发明人： Richard A. Ooms

IPC分类号： G03C1/015 ,  G03C1/06 ,  G03C1/09 ,  G03C5/08 ,  G03C5/29

CPC分类号： G03C1/09

摘要： A method for the production of a silver image with improved contrast by the development of an image-wise exposed photographic silver halide emulsion layer material with a developer liquid containing a hydroquinone in the presence of an auxiliary developing agent, wherein said developer liquid is applied to said photographic material containing silver halide grains that have been chemically sensitized with organic thiosulphonic acid anions in combination with a gold sensitizer in the absence of thiosulphate ions.

公开(公告)号：US4756990A

公开(公告)日：1988-07-12

申请号：US843281

申请日：1986-03-24

申请人： Richard A. Ooms ,  Robert J. Pollet

发明人： Richard A. Ooms ,  Robert J. Pollet

IPC分类号： G03C5/29 ,  G03C5/305 ,  G03C5/24 ,  G03C5/30

CPC分类号： G03C5/305

摘要： A method of effecting high contrast development of an image-wise exposed photographic silver halide emulsion layer material wherein the developing proceeds in an aqueous medium having a pH of 10 to 12 and containing:(a)(i) hydroquinone or a substituted hydroquinone,(ii) an auxiliary developing agent having a developing activity of such degree as to give when utilized in the Standard Development Test defined in the specification a relative development rate (f.sub.x) in the range of about 1-2(b) free sulphite ions in an amount of at least 5 grams per liter of the medium,(c) an organic anti-fogging agent, and(d) a polymer containing a plurality of alkylene oxide units having a molecular weight of at least about 1500.

摘要翻译： 一种影像曝光的照相卤化银乳剂层材料进行高对比度显影的方法，其中显影在pH为10至12的含水介质中进行，并含有：（a）（i）氢醌或取代的氢醌（ ii）具有显影活性的辅助显影剂，其用量在本说明书中定义的标准开发试验中用于在约1-2（b）的游离亚硫酸根离子范围内的相对显影速率（fx） 每升培养基至少5克的量，（c）有机防雾剂，和（d）含有分子量至少为约1500的多个烯化氧单元的聚合物。