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    • 3. 发明公开
    • Method for making direct-positive photographic images
    • 用于制作直接正片照相图像的方法
    • EP0634691A1
    • 1995-01-18
    • EP93202051.4
    • 1993-07-12
    • AGFA-GEVAERT naamloze vennootschap
    • Dewanckele, Jean-MarieTerrell, DavidViaene, Kris
    • G03C1/485C07D487/04
    • C07D487/04G03C1/48538G03C1/48561Y10S430/141
    • The present invention relates to a method for making direct positive photographic images by developing light-sensitive materials in the presence of development nucleators which do not cause loss of sensitivity during exposure or unevenness of development. More specifically the invention relates to the formation of direct-positive images having a high maximum density and high exposure latitude and to photographic materials for use in said formation, which is accomplished by a method for making direct-positive images comprising:

      image-wise exposing a photographic light-sensitive silver halide material comprising a support and a layer of an internal latent image-type silver halide emulsion, the pAg of which has been adjusted to a pAg-value between 9.0 and 10.5 inclusive before coating, and
      developing said exposed photographic silver halide material in a surface developer in the presence of a development nucleator with a group promoting adsorption to silver halide.

      It has been found that in a particular embodiment of this invention a development-nucleating amount of a hydrazine compound with a 7-hydroxy-s-triazolo-[1,5-a]-pyrimidine group as group promoting adsorption to silver halide is very useful.
    • 本发明涉及一种通过在存在显影成核剂的情况下显影光敏材料来制造直接正片照相图像的方法,所述显影成核剂在曝光过程中不会引起感光度损失或显影不均匀。 更具体地说,本发明涉及具有高的最大密度和高曝光宽容度的直接正像的形成以及用于所述形成的照相材料的形成,其通过用于制造直接正像的方法来实现,所述方法包括:以图像方式曝光 一种照相感光卤化银材料,它包括载体和一层内部潜像型卤化银乳剂,其中pAg在涂布前已经调节到9.0和10.5之间的pAg值,并且将所述曝光照相 卤化银材料在具有促进对卤化银的吸附的显影成核剂存在下的表面显影剂中。 已经发现,在本发明的具体实施方案中,具有7-羟基-s-三唑并[1,5-a] - 嘧啶基团作为促进对卤化银的吸附的肼化合物的显影成核量是非常 有用。
    • 5. 发明公开
    • Direct positive photographic materials
    • Photographische Direktpositivmaterialien。
    • EP0358170A2
    • 1990-03-14
    • EP89116391.7
    • 1989-09-05
    • FUJI PHOTO FILM CO., LTD.
    • Shuto, Sadanobu Fuji Photo Film Co., Ltd.Tanemura, Hatsumi Fuji Photo Film Co., Ltd.Hirano, Shigeo Fuji Photo Film Co., Ltd.
    • G03C1/485
    • G03C1/48538Y10S430/141
    • A direct positive photosensitive material composed of a support having thereon at least one silver halide light-­sensitive emulsion layer containing the combination of (a) non-prefogged internal latent image silver halide grains; (b) a binder; (c) at least one compound represented by formulae (I), (II) or (III); and at least one compound represented by formula (IV):
      R-SO₂S-M      (I)
      R-SO₂S-R¹      (II)
      R-SO₂S-L m -S.O₂S-R²      (III)
      wherein R, R¹ and R² each represents a substituted or unsubstituted aliphatic group, a substituted or unsubstituted aromatic group or a substituted or unsubstituted heterocyclic group; M represents a cation; L represents a divalent linking group; and m is 0 or 1; and
      R³-SO₂-M¹      (IV)
      wherein R³ represents an aliphatic group, an aromatic group or a heterocyclic group; and M¹ represents a cation. The material provides a direct positive image with high Dmax, low Dmin and high contrast.
    • 一种直接正性感光材料,其由其上具有至少一种含有(a)非预成像的内部潜像卤化银颗粒的组合的卤化银感光乳剂层组成的载体构成; (b)粘合剂; (c)至少一种由式(I),(II)或(III)表示的化合物; 和至少一种由式(Ⅳ)表示的化合物:R-SO 2 S-M(I)R-SO 2 S-R 1(II)R-SO 2 S-Lm-S 2 S-R 2(III)其中R R 1和R 2各自表示取代或未取代的脂族基,取代或未取代的芳基或取代或未取代的杂环基; M表示阳离子; L表示二价连接基团; m为0或1; 和R 3 -SO 2 -M 1(IV)其中R 3表示脂族基团,芳族基团或杂环基团; M 1表示阳离子。 该材料提供具有高Dmax,低Dmin和高对比度的直接正像。
    • 6. 发明公开
    • Azo compound
    • AZO化合物
    • EP0220042A3
    • 1990-01-17
    • EP86307904.2
    • 1986-10-13
    • IMPERIAL CHEMICAL INDUSTRIES PLC
    • Allen, SimonGordon, Paul FrancisHann, Richard Anthony
    • C09B29/06G02F1/00
    • G02F1/3612C09B29/0007G02F1/3611G02F1/3614G02F1/377Y10S430/141Y10S430/146Y10S534/02
    • (i) A compound of the formula:
      wherein R is H, a metal or a group containing a tetravalent N atom;
      R' is N0 2 . CN or COOY; Y is H C 1-4 -alkyl, a metal or a group containing a tetravalent N atom; R 2 & R 3 are each independently H or a non-hydrophilic aliphatic or cycloaliphatic group containing up to 30 carbon atoms; R 4 & R 5 are each independently H or a non-hydrophilic aliphatic or cycloaliphatic group containing up to 30 carbon atoms; and R 6 & R 7 are each independently H or a non-hydrophilic group containing up to 4 carbon atoms; or R 4 & R 6 together comprise ring fused to Ring A and R 5 & R 7 are as hereinbefore defined; or R5 & R 7 together comprise ring fused to Ring A and R 4 & R 6 are as hereinbefore defined; or R 2 & R 4 together with the N atom te which R 2 is attached form a ring fused to Ring A and R 3 & R 5 are as hereinbefore defined; or R 3 & R 5 together with the N atom to which R 3 is attached form a ring fused to Ring A and R 2 & R 4 are as hereinbefore defined; provided there are, in total, from 8 to 40 carbon atoms in one or two of the groups independently represented by R 2 . R 3 , R4 & R 5 ; (ii) an optical element comprising a compound of Formula I having non-linear optical (NLO) properties for use in the generation of NLO signals. (iii) a method of preparation of such an optical element comprising a plurality of monomolecular layers of the compound of Formula I on the surface of a transparent or reflecting substrate by a Langmuir-Blodgett technique: and (iv) an optical device incorporating such an optical element.