US3222174A - Process and material for the manufacture of etched printing plates - Google Patents

Process and material for the manufacture of etched printing plates Download PDF

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Publication number
US3222174A
US3222174A US66316A US6631660A US3222174A US 3222174 A US3222174 A US 3222174A US 66316 A US66316 A US 66316A US 6631660 A US6631660 A US 6631660A US 3222174 A US3222174 A US 3222174A
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US
United States
Prior art keywords
layer
support
film
permanent support
gelatino
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US66316A
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English (en)
Inventor
Rott Andre
Verelst Johan Lodewijk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gevaert Photo Producten NV
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Gevaert Photo Producten NV
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Publication date
Application filed by Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
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    • 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
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/805—Photosensitive materials characterised by the base or auxiliary layers characterised by stripping layers or stripping means
    • 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 relates to etched printing plates, and more particularly to photographic stripping material used for the manufacture of such printing plates.
  • This stripping lm mainly consists of a light-sensitive and unhardened gelatino silver halide emulsion layer coated on a thin -cellulose ester lilm, called a permanent support, which in its turn is applied in such a way to a thicker transparent film support, called a temporary support, that it can be stripped olf.
  • a temporary support the raw materials used for the manufacture of photographic supports, eg., cellulose esters, polyesters, polycarbonates, polysulfonates and polyamides can be used.
  • the light-sensitive layer is treated with a tanning developer and, as the case may be, fixed, washed and dried.
  • the permanent support can be removedfaster and without supply of heat by stripping u 3,222,174 Patented Dec. 7, 1965 it as a coherent membrane which is ⁇ done by wetting this support for a few seconds with armixture containing a solvent for this support and a less, volatile nonsolvent and then evaporating the mixture in the air for a few seconds.
  • an anti-halation layer (2) a subbing layer (3) a temporary support (4) astripping layer (5) a permanent or thin support -of cellulose ester containing 5-40 plast-icizr (6) asubbing layer (7) alightfsensitiveemulsion,
  • the new process is more reliable if an adapted amount of a swelling agent for the permanent support, such as e.g. ethanol, is added to the mixture of solventand nonsolvent used.
  • a swelling agent for the permanent support such as e.g. ethanol
  • cellulose ester lm serving as permanent support contains a relatively ⁇ considerable amount of plasticizer; for this purpose a pla-sticizer in an amount ranging from 5 to 40% but preferably of at least 10% can be added to the casting composition from which the permanent support is cast, or, if the temporary support consists of a cellulose ester, a support can be used which contains a large amount of plasticizer which afterwards can pass into the permanent support by diffusion.
  • Suitable plasticizers are eng. triphenylphosphate, tricresylphosphate, Palatino] A, Palatinol M, Palatino O (trade names for diethylphthalate, dimethylphthalate, resp, di(methoxyethyl)-phthalate, marketed by Badische Anilin- & Soda-Fabrik A.G., Ludwigshafen/Rh), Santicizer (trade name for tolyldiphenylphosphate, marketed by Monsanto Chemical Company, St.
  • the thickness of the aforesaid subbing layer is not as critical. Preferably, however, a thickness smaller than 0.4/1. is used.
  • no warm water is needed for the removal of the permanent support (treatment 5).
  • the application of the process accordinging to the present invention enables to exclude before etching (treatment 7) the prolonged cooling of the cppr cylinder serving as printingplate. In this way the whole process of the'n-ariufctdre of printing plates is considerably shortened.
  • EXAMPLE l Materal.-A stripping lm is manufactured by applying successively the following layers onto the front side of a cellulose triacetate support (I) of a thickness of 0.15 mm., the rear side of which is provided with the usual photographic subbing (II) and anti-halation layers (III).
  • a subbing layer (VI) from the following composition:
  • Treatment 1 This light-sensitive material is rst exposed through a gravure screen and then through a continuous tone diapositive.
  • Treatment 2 The exposed material is treated for 3 minutes in a development solution of the following composition: Sodium sulfate (anhydrous) g-- 5 Sodium sulte (anhydrous) g-.. 20 Pyrocatechol g 6 Pyrogallol g 8 1% solution of 6nitrobenzimidazole in methanol cc 8 Water to oc 1000
  • the developed material is immersed for 3 minutes into a solution consisting of Sodium carbonate (anhydrous) g 170 Water to cc- 1000
  • the developed material is then fixed for 5 min.
  • Treatment 5 A mixture consisting of Acetone cc 400 Ethanol cc-- 500 Water cc 100 is poured onto the plate and after 15 sec. of action and 15 sec. of drying at the air, the nitrocellulose membrane is stripped olf.
  • a stripping film is manufactured by successively applying the following layers to the front side of a polyethylene terephthalate support (I) of 0.10 mm. thickness, the rear side of which is provided with the usual photographic subbing (II) and antihalation layers (III):
  • Example 1 (4) a silver chloro-bromide emulsion such as in Example 1.
  • the film sheet is transferred by pressing onto a wetted copper printing cylinder. After 1 min., the temporary support is removed by stripping. The cylinder is then washed with a mixture consisting of:
  • Acetone cc 85 Methanol cc 'l0 Wat-er cc 5 AfterlS sec. of action the cylinder is dried for a short time in the air whereupon the cellulosetriacetate sheet is stripped -oif as a coherent membrane. Next, the gelatin image layer is washed out for 6 to 10 min. with an unheated aqueous solution of sodium salicylate. After this washing period, the remaining gelatin relief is treated by pouring thereon an unheated mixture consisting of ethanol (800 cc.) and water (200 ce), and quickly dried in a cold air current. Immediately thereafter the etching can be started.
  • said cellulose ester is selected from the group consisting of cellulose acetate and cellulose nitrate, said organic ketone is acetone, and said alkanol contains up t-o two carbon atoms.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Printing Methods (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
US66316A 1959-11-03 1960-10-31 Process and material for the manufacture of etched printing plates Expired - Lifetime US3222174A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL244985 1959-11-03

Publications (1)

Publication Number Publication Date
US3222174A true US3222174A (en) 1965-12-07

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ID=19752011

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US66316A Expired - Lifetime US3222174A (en) 1959-11-03 1960-10-31 Process and material for the manufacture of etched printing plates

Country Status (6)

Country Link
US (1) US3222174A (de)
BE (1) BE584847A (de)
CH (1) CH399182A (de)
DE (1) DE1422490A1 (de)
GB (1) GB938960A (de)
NL (2) NL100818C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485629A (en) * 1966-07-21 1969-12-23 Bell & Howell Co Photo process

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614932A (en) * 1949-04-01 1952-10-21 Eastman Kodak Co Photographic stripping film
US2650877A (en) * 1949-12-09 1953-09-01 Du Pont Process of producing etched printing plates
US2805948A (en) * 1955-06-27 1957-09-10 Gen Aniline & Film Corp Photographic stripping film
US2892711A (en) * 1954-08-13 1959-06-30 Roy S Sanford & Company Process for producing gelatin relief images on printing plates
US2993790A (en) * 1958-04-18 1961-07-25 Du Pont Processes for making resists
US3057722A (en) * 1958-08-07 1962-10-09 Du Pont Photographic stripping film

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614932A (en) * 1949-04-01 1952-10-21 Eastman Kodak Co Photographic stripping film
US2650877A (en) * 1949-12-09 1953-09-01 Du Pont Process of producing etched printing plates
US2892711A (en) * 1954-08-13 1959-06-30 Roy S Sanford & Company Process for producing gelatin relief images on printing plates
US2805948A (en) * 1955-06-27 1957-09-10 Gen Aniline & Film Corp Photographic stripping film
US2993790A (en) * 1958-04-18 1961-07-25 Du Pont Processes for making resists
US3057722A (en) * 1958-08-07 1962-10-09 Du Pont Photographic stripping film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485629A (en) * 1966-07-21 1969-12-23 Bell & Howell Co Photo process

Also Published As

Publication number Publication date
CH399182A (fr) 1966-03-31
GB938960A (en) 1963-10-09
NL244985A (de)
BE584847A (de)
DE1422490A1 (de) 1968-11-07
NL100818C (de)

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