Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C1/00—Photosensitive materials
  • G03C1/72—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705
  • G03C1/725—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705 containing inorganic compounds
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C1/00—Photosensitive materials
  • G03C1/72—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705
  • G03C1/725—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705 containing inorganic compounds
  • G03C1/7256—Mercury salts
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
  • G03C5/58—Processes for obtaining metallic images by vapour deposition or physical development
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
  • Y10S430/137—Cobalt complex containing

Definitions

• the invention relates to methods of forming photographic images With the use of metallic mercury separated out of a mercury salt.
• Metallic mercury may be formed from mercurous salts not only by reduction but also by other means, i. e. by
• a photochemical system, in which use is made, of the reaction mentioned under H for the formation of mercury atoms is already known, inter alia from Dutch patent specification No. 46,296.
• mercury atoms are formed in substantially equivalent quantities, concentrating to mercury drops, which are subsequently amplified by physical development with the use of a developer comprising precious metal ions to form precious metal contrasts.
• a developer comprising precious metal ions to form precious metal contrasts.
• methyl-6-hydroxy-l-diazoniurn-2-benzenesulphonic acid 4 Phot. 1. 90 b 34-40 (1950)
• a solution for example, of 0.1 m.; this is divided into two parts: one part is exposed a mercurous nitrate solution is then added to both parts.
• the solution not exposed must not separate out metallic mercury, whereas the solution exposed should do so. Disproportioning may be shown by potentiometric titration or by a qualitative reaction.
• a lyophile layer for example, paper, re-generated cellulose or textile may be soaked in a solution of a light-sensitive compound. Subsequent to the exposure the layer is introduced into a solution containing mercurous ions for example 0.01 n mercurous nitrate and then into a physical developer.
• the mercurous nitrate may be already added to the sensitizing liquid.
• ions and molecules are preferably used in the form of stable complex compounds, in which the disproportioning molecules or ions are bound to at least one central metal ion, whilst, moreover, particularly the organic cyanogen compounds and sulphite compounds also exhibit the desired effect.
• complex compounds of many metal ions such for example as the complex compounds of Cr(III), Fe(III), Co(II I), Rh(III), Mo(IV), Mo(V), W(IV), Mn(III).
• the cyanogen ion forms sufficiently stable complex compounds with many metal ions, these compounds being usually decomposed upon exposure to visible light or to light on the verge of ultraviolet.
• Complex metal compounds are not light-sensitive on a photographic sense cannot be used for the method according to the invention, such for example as complex platinum cyanides which, upon exposure, fluoresce and do not dissociated.
• the pH at which these complex compounds are used should be taken into account with a view to their stability.
• organic cyanogen compounds are particularly suitable the cyanogen hydrides of aldehydes, more particularly of aromatic aldehydes.
• the absorption spectrum of these compounds may be rendered favourable by the introduction of substituents, particularly nitro-groups into the core.
• Excellent compounds are, for example, orthoand paranitro-almond acid nitril.
• diazo-cyanides in
• Example II treated in a manner similar to that described under Example I.
• the images obtained have a steeper gradation and the sensitiveness is slightly smaller than with Example I.
• Example III A foil similar to that mentioned above in the above examples is soaked in a saturated aqueous solution of potassium-diamino tetranitro-cobaltiate This solution is less than 0.1 molar. In the manner described above (development for five minutes) ten steps of the sensitometer key were reproduced: the blackening did not exceed 2. The gradation is soft with a satisfactory half-tone reproduction; the sharpness is satisfactory, the colour is neutral grey.
• Example 1V superficially saponified ethylcellulose is soaked for 2 minutes in a 0.1 molar solution of O-nitrobenzaldehyde cyanogenhydrine in 40% alcohol, then wiped and dried. Subsequent to exposure under a negative with the use of a mercury-vapour lamp this material is bathed for a short time in a solution containing 0.01 to 0.1 mercurous nitrate; it is then physically developed in 0.5% metol-2% citric acid-0.4% silver nitrate -for 5 minutes. Very smart diapositive pictures of neutral grey to deep black in colour, having an excellent halftone reproduction and a great contrast effect is obtained.
• a pigment image may be produced in the area of and instead of the precious metal image. Then the precious metal image may, if necessary, be eliminated by means of one of the known attenuators, so that only a pigment image is left.
• a method of producing photographic contrasts comprising the steps, selectively exposing a light-sensitive layer containing a salt of a complex ion consisting of a metal selected from the group consisting of Co, Cr, Fe, Rh, Mo, W and Mn and at least one member of the group consisting of Cu, CNS, NO2 SO3, 8203-, NHz, C5H5N, and
• R being a member of the group consisting of hydrogen and alkyl, to partly decompose said salt at selected portions of the layer, then applying to said exposed layer an aqueous solution of a water soluble mercurous salt to form latent mercury contrasts, and physically developing the mercury contrast by applying to the mercury contrast an aqueous solution of a salt of a noble metal reducible to metal and a reducing agent for said metal so as to deposit said noble metal on said mercury contrast.

Landscapes

• Chemical & Material Sciences (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Inorganic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
• Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
• Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=40810779

Family Applications (1)

Country Status (6)

Cited By (1)

Citations (11)

• 0
  • BE BE506160D patent/BE506160A/xx unknown
• 1950
  • 1950-10-03 NL NL156395A patent/NL81921C/xx active
• 1951
  • 1951-09-24 US US248102A patent/US2764484A/en not_active Expired - Lifetime
  • 1951-09-28 GB GB22669/51A patent/GB737874A/en not_active Expired
  • 1951-09-29 DE DEN4481A patent/DE892552C/de not_active Expired
  • 1951-10-01 FR FR1050351D patent/FR1050351A/fr not_active Expired

Patent Citations (11)

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