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
  • G03C1/73—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705 containing organic compounds

Definitions

• the resent invention relates to the roduction 0 photographic prints, articu arly to the development of copies on ayers contain- 1 ing as a light-sensitive substance a salt of a lene series.
• Example 3.-A paper coated with a layer containing sodium '1.2-naphthoquinone4i-sulfonate and hydroxybenzene is developed after exposure with gaseous ammonia. The directly resulting dark-green positive copy changes its color to'blue-violet after a short ex osure to the air.
• t is not necessary that the sensitive layers according to the preceding examples contain the developing agent ,(hydroxybenzene, resorcinol).
• the exposed layers containin the sensitizing'compound can also be deve oped in an alkaline solution of the developing agent.
• the process of making photographic 'pgints whlch consists in exposing to ihght a hind a positive a su port coated with a 95 salt .ojalsulfonic acid 0' a 1.2-quinone of the the exposed light-sensitive surface wit p enol and an alkali.
• Light-sensitive materials oom rising a support coated with a salt "ofa'sul onic acid of a 1.2-quino'ne ofthe naphthalene series and an,or anic compound containing an acid methy ene-grou 5.
• Light-sensitive materials comprising a support coated with a salt of asul onic acid a of a 1.2-quinone of the naphthalene series and .a hydroxy benzene.
• Light-sensitive materials com rising a I support coated with a salt of a sul onic acid of al.2-quinone of the naphthalene series and phenol.
• the room of making photographic I prints whlch consists in exposing to light ehind a positive a support coated with a 15 salt of a sulfonic acid 0 a 1.2-quinone of the naphthalene series, and developing thevexposed light-sensitive surface with a hydroxy compound of the benzene series already present 1n the light-sensitive layer by the action 20 of gaseous ammonia.
• i 9 The room of making photographic I prints whlch consists in exposing to light ehind a positive a support coated with a 15 salt of a sulfonic acid 0 a 1.2-quinone of the naphthalene series, and developing thevexposed light-sensitive surface with a hydroxy compound of the benzene series already present 1n the light-sensitive layer by the action 20 of gaseous ammonia.
• the process of making photographic rints WhlCh consists in exposing to light Eehind a positive a su port coated with a salt of asulfonic acid 0 a 1.2-quinone' of the g5 naphthalene series, and developin the exwposed light-sensitive surface wit phenol already present in the light-sensitive layer bythe action of aseous ammonia.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Heat Sensitive Colour Forming Recording (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7187669

Family Applications (1)

Country Status (3)

Cited By (1)

• 0
  • FR FR35018D patent/FR35018E/fr not_active Expired
• 1928
  • 1928-02-24 US US256809A patent/US1833856A/en not_active Expired - Lifetime
  • 1928-03-10 GB GB7490/28A patent/GB286736A/en not_active Expired
  • 1928-04-25 GB GB12118/28A patent/GB289386A/en not_active Expired

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