US1598061A - Film for photocollographic printing plates - Google Patents

Film for photocollographic printing plates Download PDF

Info

Publication number
US1598061A
US1598061A US7201225A US1598061A US 1598061 A US1598061 A US 1598061A US 7201225 A US7201225 A US 7201225A US 1598061 A US1598061 A US 1598061A
Authority
US
United States
Prior art keywords
film
gelatin
photocollographic
printing plates
layer
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
Application number
Inventor
Sperati Mariano De
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.)
Argentographica (usa) Ltd
ARGENTOGRAPHICA USA Ltd
Original Assignee
ARGENTOGRAPHICA USA Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US643435A external-priority patent/US1587220A/en
Application filed by ARGENTOGRAPHICA USA Ltd filed Critical ARGENTOGRAPHICA USA Ltd
Priority to US7201225 priority Critical patent/US1598061A/en
Application granted granted Critical
Publication of US1598061A publication Critical patent/US1598061A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • G03F7/14—Production of collotype printing forms
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y10T428/31768—Natural source-type polyamide [e.g., casein, gelatin, etc.]
    • Y10T428/31772—Next to cellulosic

Definitions

  • the film comprises a transparent or translucent support, say of celluloid,
  • the support onv which of and two gelatine support faces, the is on the side of the printing surface the the final printing plate is to be obtained being of such a-character as to be less easily dissolved than the tended to provide relief.
  • Said two layers them is of a gelatin at a temperature of other layer which is ine pressure equalizing are of gelatin and one of adapted to dissolve say 0 C. while the other one is of a gelatin adapted to dissolve at a somewhat lower temperature, say at40O C.
  • 1 is a transparent or trans-l lucent support, say of Celluloid
  • 2 and 3 are the two gelatin layers above referred to, the layer 2 being of a gelatin adapted to dissolve at a higher temperature thanthe gelatin of layer 3.
  • said two layer film issensitized by means of' an alkali dried, and then is ex negative image', with 1 fter exposure to both layers is left in bichromate bath and posed 'to light under a ts less-easily dissolved ayer in contact with the negative.
  • Said ilm is then treated with water at a temperature of 40 C., say vby dipping it in a bath of water having such/a temperature.
  • Such treatment does not affect the layer of gelatin dissolving at '(1. and it merely removes from said layerthe alkali bichromate not acted on by light, while in the other gelatin layer it removesgelatin to a more or less full extent in places where it has not been made insoluble by the action of light on alkali rbichromate-that is, 1n register with dark portionsv of the while gelatin is left unadected in places where it has been acted on by light and made hard-that is, in register with transparent portions of said negative.
  • the film has on its back side relief portions in register with the hard and ink-retaining portions of its printing layer, while it shows on said back side depressions in register with swelled out portions of said printing layer.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)

Description

Aug. 31 1926. 1,598,061
M. DE SFERA-rl FILM FOR FHOTOCOLLOGRAPHIG PRINTING PLATES` I original Filed June'4, 1923 '37 wzfffw Patented Aug. 31,
U'NHTED STATES PATENT OFFICE.
MARIANO DI SPEEATI, OF TURIN, ITALY, .ASSIGNOR T0 ARGENTOGRAPHICA (U. S. A.) n
LIMITED, 0F LONDON, ENGLAND.
FILM FOR PHOTGCOLLOGRARHIC PRINTING IIIIQAIIEIS.`
Original application led June 4, 1923, Serial No; 643,435,
application This invention relates to the preparation of photocollographic printing complementary pressure-equalizing portions on their backs of the plates having relief kind described m my copending application Ser. No.643,- 435, filed June et, 1923, now Patent No.
1,587,220, granted June 1,1926, of which the present case is a division, and has for its objectthe provision of in said preparation.
According to the a film adapted for use present invention the film comprises a transparent or translucent support, say of celluloid,
layers, each on one of 'one of said layers which.
the support onv which of and two gelatine support faces, the is on the side of the printing surface the the final printing plate is to be obtained being of such a-character as to be less easily dissolved than the tended to provide relief.
Said two layers them is of a gelatin at a temperature of other layer which is ine pressure equalizing are of gelatin and one of adapted to dissolve say 0 C. while the other one is of a gelatin adapted to dissolve at a somewhat lower temperature, say at40O C.
l The single figure of 1s a transverse section on an enlarged' scale` of a film according to In said figure,
the annexed drawing the' present invention.
1 is a transparent or trans-l lucent support, say of Celluloid, and 2 and 3 are the two gelatin layers above referred to, the layer 2 being of a gelatin adapted to dissolve at a higher temperature thanthe gelatin of layer 3.
For use, said two layer film issensitized by means of' an alkali dried, and then is ex negative image', with 1 fter exposure to both layers is left in bichromate bath and posed 'to light under a ts less-easily dissolved ayer in contact with the negative.
light the gelatin of water-absorbing conand in Italy May 12, 1923. Divided and this dition invregister4 with the dark portions of the negative-while it is made insoluble in both layers in register with thetransparent portions of the negative.
Said ilm is then treated with water at a temperature of 40 C., say vby dipping it in a bath of water having such/a temperature. Such treatment does not affect the layer of gelatin dissolving at '(1. and it merely removes from said layerthe alkali bichromate not acted on by light, while in the other gelatin layer it removesgelatin to a more or less full extent in places where it has not been made insoluble by the action of light on alkali rbichromate-that is, 1n register with dark portionsv of the while gelatin is left unadected in places where it has been acted on by light and made hard-that is, in register with transparent portions of said negative.
By the described treatment the film has on its back side relief portions in register with the hard and ink-retaining portions of its printing layer, while it shows on said back side depressions in register with swelled out portions of said printing layer.
Reference is made to my previously mentioned copending application Ser. No. 643,- 435, in respect of features not claimed in-the present application.
What I'claim as my invention and desire to Secure by United States Letters Patent isz- A film for use in making photocollographic printing plates having a layer of gelatin on each face ers being made of gelatin which is adapted to dissolve at a lower temperature than the'l gelatin providing the other one of said layers.v
In-testimomhereof I affix SPERATI.'
negative,
thereof, one of said lay-
US7201225 1923-06-04 1925-11-28 Film for photocollographic printing plates Expired - Lifetime US1598061A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US7201225 US1598061A (en) 1923-06-04 1925-11-28 Film for photocollographic printing plates

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US643435A US1587220A (en) 1923-01-19 1923-06-04 Photocollographic printing plate and method of making the same
US7201225 US1598061A (en) 1923-06-04 1925-11-28 Film for photocollographic printing plates

Publications (1)

Publication Number Publication Date
US1598061A true US1598061A (en) 1926-08-31

Family

ID=26752923

Family Applications (1)

Application Number Title Priority Date Filing Date
US7201225 Expired - Lifetime US1598061A (en) 1923-06-04 1925-11-28 Film for photocollographic printing plates

Country Status (1)

Country Link
US (1) US1598061A (en)

Similar Documents

Publication Publication Date Title
GB1163617A (en) A Method of Production of Coloured Contact Lenses and Eye Prostheses.
JPS599639A (en) Liquid crystal display element
US1598061A (en) Film for photocollographic printing plates
US1118479A (en) Process of producing printing-surfaces.
US1265641A (en) Method of producing printing-surfaces.
US1574378A (en) Collotype printing plate and method of making the same
US3900249A (en) Soft-focus optical element
US1408312A (en) Photographic-printing process
US1939219A (en) Process for preparing motion pictures by dye transfer
US1982967A (en) Printing element and process of making same
US1482611A (en) Thin, mounted, sensitized emulsion
US1212446A (en) Movable plate applicable to the manufacture of positive cinematograph-films and process of obtaining the same.
US1612079A (en) Photographic plate
US1484347A (en) Process for producing negatives from nontransparent originals for use in preparing printing plates
US2630384A (en) Method of establishing bleed lines around designs on printing surfaces
US2829051A (en) Photographically sensitive lenticular film
US1482612A (en) Potassium-bichromate process of photographic reproduction
US1482613A (en) Potassium iodide composition of matter for photographic processes
US1547446A (en) Process for the production of printing plates
US2236458A (en) Process for preparing composite negatives for use in the production of photogravure and rotogravure printing forms
GB1370659A (en) Methods of producing planographic printing surfaces
US1451325A (en) Cinematographic film
US2306869A (en) Etched screen and process for its production
US1477866A (en) Producing printing surfaces
US1436125A (en) Max ulljcann