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
  • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
  • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
  • G03C5/40—Chemically transforming developed images
  • G03C5/44—Bleaching; Bleach-fixing
• • 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
  • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
  • G03C5/40—Chemically transforming developed images
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
  • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
  • G03F7/004—Photosensitive materials
  • G03F7/06—Silver salts

Definitions

• the present invention is concerned with the etch- This invention relates to a methgd f r h h- 5 bleaching treatment of photo plates, films and the like.
• the etch- 1 bleaching treatment provides for the bleaching of the silver images on the photo plates and films, and for the selective decomposition of the binding agents in the exposed areas of the photo plates and films.
• the gelatin particles which are supposed to be removed during the process are not removed completely. Because of this, other means such as mechanical means are required to completely remove the gelatin particles from the treated photo plate or film.
• the partially dissolved and unremoved gelatin particles are wiped away with asoft cloth. This procedure, although removing the gelatin particles provides undesired and different results than those required. That is, the removal of the gelatin may be uneven and not completely clean.
• an etch-bleaching solution which is supposed to remove even the hardened gelatin from photo plates and films in a short period of time.
• this etch-bleaching solution there is provided 1.1 mol of copper cupric cations per liter of solution and anions which form an insoluble silver salt.
• the gelatin particles are not removed completely from the photo plates without applying additional mechanical means, e.g. wiping the gelatin particles off with a soft cloth.
• an improved method for the etch-bleaching treatment of exposed and developed photo plates and films.
• the method provides a means for completely removing the gelatin particles from photo plates and/or films during the etch-bleaching thereof.
• the method comprises immersing the photo article in an etchbleaching solution containing copper cations, and applying an ultrasonic sound to the immersed photo article from an ultrasonic source for a sufficient period of time to completely remove the gelatin particles therefrom.
• a more particular object of the present invention is to provide a method of etch-bleaching photo plates and/or films wherein the gelatin particles are completely removed from the treated photo article.
• the silver images of the photo article are bleached and the binding agents remaining in the exposed areas of the photo article are selectively decomposed. Also, the partially decomposed gelatin particles of the treated photo article need to be removed and cleaned therefrom in order to provide a satisfactory and functionary photo plate or film.
• the present method is primarily concerned with a means and method of removing completely the gelatin particles from photo plates and/or films during the etch-bleaching treatment thereof.
• a photo plate or film is etch bleached by first being immersed into an etch-bleaching solution and then applying an ultrasonic sound to the immersed photo article for a sufficient period of time to completely remove the partially dissolved gelatin particles from the treated photo article.
• the photo article being treated i.e. etch-bleached, such as a photo plate or film is initially suspended vertically within a suitable etch-bleaching solution.
• an ultrasonic sound source which may be movably mounted in the etchbleaching bath, is moved back and forth in a reciprocating manner in a path which is parallel to the surface of the photo article being treated.
• the etch-bleaching solution that can be used according to the present invention includes a mixture of cop per chloride, a mild acid, water and hydrogen peroxide.
• the mild acid may be glacial acetic acid or citric acid.
• the copper chloride may be a cupric copper solution.
• the copper chloride may also be replaced with copper sulfate and/or sodium bromide.
• the source for the ultrasonic or high frequency sound may be any conventional apparatus or device 'known in the art. According to the present invention,
• the ultrasonic source is not firmly placed or mounted in front of the photo article.
• the ultrasonic source is preferably arranged in the etchbleaching path to move in a path which is parallel to the surface of the photo plate or film being treated.
• EXAMPLE 1 A photo plate was exposed in a conventional manner. Thereafter, the exposed photo plate was developed in a suitable liquid and then watered for approximately one minute and carefully flushed. An etch-bleaching solution was provided in a suitable bath. The solution consisted of a mixture of two parts:
• an ultrasonic source was submerged in the solution.
• the ultrasonic source was moved back and forth in a path parallel to the surface of the vertically suspended photo plate.
• the photo plate was rotated 180 degrees and was treated with ultrasonic sound waves on its opposite side.
• the ultrasonic etch-bleaching treatment lasted for a period of 8 minutes.
• the photo plate was watered, developed a second time and once again watered for one or two minutes.
• the photo plate was once more watered for a period of twenty to thirty seconds.
• the photo plate was then dried for a period of about thirty minutes.
• the etch-bleaching treatment with the ultrasonic sound being applied to the photo plate was done with red lighting and the subsequent steps in ordinary daylight.
• gelatin particles were completely removed from the etch-bleach treated photo plate.
• EXAMPLE 2 A similar photo plate was developed as in Example 1 and was treated in the same manner as in Example 1, except that the etch-bleaching solution included a Part A which instead of that provided in Example 1, consisted of:
• Part A 5160 gms copper sulfate 2700 gms citric acid 135 gms sodium bromide l8 liters water (H O) This part A was mixed with a Part B consisting of 800 ccm of hydrogen peroxide (H a short period of time before it was used as the etch-bleaching bath for the photo plate. The photo plate was treated and washed in the same manner as set forth in Example 1.
• the treatment resulted in completely removing the gelatin particles from the photo plate.
• the present invention provides an improved means for etch-bleaching photo plate and films with the advantage that the gelatin particles are completely removed from the photo plate and/or film without the application of any additional mechanical means.
• a method of physically removing gelatin particles during etch-bleaching of exposed and developed photo-plates, films and the like utilizing gelatin emulsions comprising:
• an ultrasonic sound for at least a period of minutes to the immersed photo article from an ultrasonic source to apply mechanical force to the gelatin particles of the photo article, whereby and subsequently washing the photo article, preferably with a period of applied ultrasonic sound, such particles are thereby physically removed completely therefrom.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• ing And Chemical Polishing (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=5827655

Family Applications (1)

Country Status (8)

Cited By (8)

Citations (4)

• 0
  • BE BE792499D patent/BE792499A/xx not_active IP Right Cessation
• 1971
  • 1971-12-10 DE DE2161407A patent/DE2161407C3/de not_active Expired
• 1972
  • 1972-07-06 NL NLAANVRAGE7209443,A patent/NL176980C/xx not_active IP Right Cessation
  • 1972-10-25 GB GB4930672A patent/GB1366816A/en not_active Expired
  • 1972-11-20 US US00308112A patent/US3849135A/en not_active Expired - Lifetime
  • 1972-11-30 IT IT32299/72A patent/IT971384B/it active
  • 1972-12-07 FR FR7243571A patent/FR2162542B1/fr not_active Expired
  • 1972-12-08 LU LU66615A patent/LU66615A1/xx unknown

Patent Citations (4)

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