US1329088A - Process of making printing-plates - Google Patents
Process of making printing-plates Download PDFInfo
- Publication number
- US1329088A US1329088A US817914A US1914817914A US1329088A US 1329088 A US1329088 A US 1329088A US 817914 A US817914 A US 817914A US 1914817914 A US1914817914 A US 1914817914A US 1329088 A US1329088 A US 1329088A
- Authority
- US
- United States
- Prior art keywords
- plate
- dots
- tone
- etch
- ink
- 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
Links
- 238000000034 method Methods 0.000 title description 10
- 238000005530 etching Methods 0.000 description 10
- 239000000843 powder Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000002641 tar oil Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004063 acid-resistant material Substances 0.000 description 2
- 238000010410 dusting Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 102000009027 Albumins Human genes 0.000 description 1
- 108010088751 Albumins Proteins 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001477893 Mimosa strigillosa Species 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019646 color tone Nutrition 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N3/00—Preparing for use and conserving printing surfaces
- B41N3/003—Preparing for use and conserving printing surfaces of intaglio formes, e.g. application of a wear-resistant coating, such as chrome, on the already-engraved plate or cylinder; Preparing for reuse, e.g. removing of the Ballard shell; Correction of the engraving
Definitions
- esses for producing by chemical and vmechanical means a deep etched plate.
- Objects of the invention are to provide photo-mechanically a printing plate which is deep etched without sacrificingl or weakening the half-tone dots therein, and without marring the gradation of color tones therein; to produce entirely by mechanical. means a plate in which the top or upper portions of the half-tone dots or like figures are preserved intact as to area, while securing a deep etch or depression of the sur-rounding portions of the plate.
- the invention consists in the novel steps, processes, combinations and improvements herein indicated and described.
- Figure l represents the plate after the first etch
- Fig. 2 represents the plate with the protective covering l applied to the faces and sides of the screen figure preparatory to the deep etch
- Fig. 3 represents the plate after the deep etch.
- the preliminary steps in making a half-tone plate may be performed in the usual manner.
- An original may be placed before the camera, and a negative made therefroinwith the interposition of the half-tone -screen prod-ucing the usual 'stippled or half-tone negative.
- a copper plate, or other like plate is sensitized in a suitable manner, as by having applied to its surface a solution of albumin mixed with a light sensitive agent, such as ammonium bichromate. This solution is spread in a uniform layer over the surface of the plate and dried as a coating thereon in a suitable manner as by whirling the plate over a heater.
- a light sensitive agent such as ammonium bichromate
- the sensitized surface of the plate is then exposed to .light action beneath the halftone negative, and is afterward developed in water. in case of the enameled top plate, it is then heated and the enamel burnt in.
- the plate is then given its first etch in the usual manner, preferably with ,ferrie chlorid solution.
- the acid resistant material using preferably asphaltum powder, which powder is applied uniformly over the plate.
- the loose powder is removed from the uninked portions of the plate, in a suitable manner as by gentle brushing with a soft brush or with a powder puff.
- the asphaltum powder remaining adherent upon the inked portions of the plate is heated or burned so as to melt the powder and cause it to run together to form a proper acid resistant coating over the ink.
- the burning or melting of the powder is regulated so as to avoid melting the ink and thereby causing it to run down farther along the sides of the half-tone dots or figures.
- FIG. 5 designates the body of a plate and 6 the dots thereon, 7 the protecting covering of ink applied as described after the first etch which extends over the top of each dot and approximately half way down the sides thereof. 8 indicates the part cut away by the second etch effected While the top and sides of the dots are protected.
Landscapes
- Printing Plates And Materials Therefor (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
- ing And Chemical Polishing (AREA)
Description
E. LEITNER.
PROCESS 0F MAKING PRINTING PLATES.
APPLICATION FILED FEB. I0. I9I4.
1,329,088. Patented Jan. 27, 1920.
f l. 73%7 l 7 Syvum/vtm: mz'ZeiZ//er UNITED sTATEs PATENT oEEIcE. l
EMIL LEITNER, OF HOBOKEN, NEW JERSEY, ASSIGNOR TO POWERS PHOTO ENGRAVING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK. l
PROCESS OF IVIAKING PRINTING-PLATES.
Specification of Letters Patent.
Patented Jan. 27, 1920.
Application led February 101914. Serial No. 817,914.
esses for producing by chemical and vmechanical means a deep etched plate.
Objects of the invention are to provide photo-mechanically a printing plate which is deep etched without sacrificingl or weakening the half-tone dots therein, and without marring the gradation of color tones therein; to produce entirely by mechanical. means a plate in which the top or upper portions of the half-tone dots or like figures are preserved intact as to area, while securing a deep etch or depression of the sur-rounding portions of the plate. These and other ob- -jects of the invention will be set forth hereinafter in part, and in part will be obvious.
The invention consists in the novel steps, processes, combinations and improvements herein indicated and described.
The accompanying drawings represent d-iagrammatically and on a highly magnified scale certain steps in the process. Figure l represents the plate after the first etch; Fig. 2 represents the plate with the protective covering l applied to the faces and sides of the screen figure preparatory to the deep etch; and Fig. 3 represents the plate after the deep etch.
In carrying out my process, the preliminary steps in making a half-tone plate may be performed in the usual manner. An original may be placed before the camera, and a negative made therefroinwith the interposition of the half-tone -screen prod-ucing the usual 'stippled or half-tone negative.
A copper plate, or other like plate, is sensitized in a suitable manner, as by having applied to its surface a solution of albumin mixed with a light sensitive agent, such as ammonium bichromate. This solution is spread in a uniform layer over the surface of the plate and dried as a coating thereon in a suitable manner as by whirling the plate over a heater.
The sensitized surface of the plate is then exposed to .light action beneath the halftone negative, and is afterward developed in water. in case of the enameled top plate, it is then heated and the enamel burnt in. The plate is then given its first etch in the usual manner, preferably with ,ferrie chlorid solution.-
After theplate has been so developed and etched, its surface is broken up into a great' number of dots or like screen figures, by the action of the'half-tone screen in a wellknown manner. I apply an acid resistant material .to the tops or faces of the dots or screen figures, and also tothe upper part of the sides thereof.4 For this purpose, I roll up the plate with a mixture of printers ink with tar oil, using preferably a jobbing ink, such for example as Helmuths job After drying the developed plate,
black Z. W. grinding, using or mixing the S ink and oil in substantially the proportions 'of one part of the oil to from three to four parts of the ink. After the ink and oil have been thoroughly and uniformly mixed together, I roll up the plate therewith.- In rolling up the plate I use ayvroller made of the ordinary inking roller composition mounted in bearings to turn easily instead of the ordinary hard leather covered rolling up roller. By the use of the resilient composition roller t'heindividual dots depress its surface and the ink is thus carried down the sides of the dots. The rolling is continued untilthe ink not only covers the top or surface of the dots, or like half-tone figures, but goes down the sides thereof to a distance substantially half-way of the depth of the depressions as left by the first etch.
After the ink has been so put on, I apply to the plate, the acid resistant material, using preferably asphaltum powder, which powder is applied uniformly over the plate. The loose powder is removed from the uninked portions of the plate, in a suitable manner as by gentle brushing with a soft brush or with a powder puff.
The asphaltum powder remaining adherent upon the inked portions of the plate is heated or burned so as to melt the powder and cause it to run together to form a proper acid resistant coating over the ink. The burning or melting of the powder is regulated so as to avoid melting the ink and thereby causing it to run down farther along the sides of the half-tone dots or figures.
The plate so protected by its acid resistant coating, I etch with a deep etch, such as iron perchlorid, and by reason of both the top and the upper portion of the sides of the half-tone dots or like figures being protected by the resist, the deep etching acts onlyin the depressions between `said dots or hke screen figures, without affecting the to and upper portion of the sides thereof, t at is yvlthout decreasing the size of the printing surface or area of the dots or like screen figures and thusv without impair-ing or vary'- y ing the relative tones of the plate. Thisgives an excellent printing plate adapted for use with many ing papers, printing more easily, requiring very little make-ready or other preliminary preparations, and making an exceedingly useful and excellent printing plate under widely varying conditions of use.
In the drawings 5 designates the body of a plate and 6 the dots thereon, 7 the protecting covering of ink applied as described after the first etch which extends over the top of each dot and approximately half way down the sides thereof. 8 indicates the part cut away by the second etch effected While the top and sides of the dots are protected.
It will be understood that variations from the herein described steps may be made, Within the scope of the accompanying claims, Without. departing from the principles of the invention and without sacriicing its chief advantages.
What I claim as my invention and desire to secure by Letters Patent is l. The process of deep etching a plate having a half tone design etched thereon in which the dotsof the design have the tone values of. the original, which process consists in applying a protecting covering to different klnds of printboth the top andthe upper portions only of the sides of the dots etch, and deep etching the low unprotected places between the dots, whereby the relative tonevalues of all parts of the plate are maintained. by theprevention of the diminution in size of the dots during the deep etching.
2. The. process of deep etching a plate having a half tone design etched thereon in which the dots of the design have the tone values of the original, which prof-ess con sists in applying a covering consisting of a mixture of printers ink and tar oil o both the top and the upper portions only of the .sldes of the dotsformed by the iirst etch,
dusting the plate with acid resist powder, and deep-etching the 10W unprotected places betweenthe dots, whereby the relative tone values of all parts of the plate are maintained by the prevention of the diminution in size of the dots during the deep etching. 3. The process of deep etching a plate having a half tone design etched thereon in which the dots of the design have the tone values of the original, which process consists in applying a covering consisting of a mixture of printers ink and tar oil to both the top and the upper portions only of the sides of lthe dots formed by the first etch, dusting the plate with asphaltum, heating the plate and deep-etching the low unprotected places bet-Ween the dots, whereby therelative tone values of all parts of the plate are maintained by the prevention of the diminution in'size of the dots during the deep etching. In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.
EMIL LEITNER. Witnesses:
JOHN D. MORGAN, JOHN W. SNYDER.
formed by the first
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US817914A US1329088A (en) | 1914-02-10 | 1914-02-10 | Process of making printing-plates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US817914A US1329088A (en) | 1914-02-10 | 1914-02-10 | Process of making printing-plates |
Publications (1)
Publication Number | Publication Date |
---|---|
US1329088A true US1329088A (en) | 1920-01-27 |
Family
ID=25224187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US817914A Expired - Lifetime US1329088A (en) | 1914-02-10 | 1914-02-10 | Process of making printing-plates |
Country Status (1)
Country | Link |
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US (1) | US1329088A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2887042A (en) * | 1955-03-22 | 1959-05-19 | Eastern Engraving And Machine | Embossing rolls and product thereof |
US3045321A (en) * | 1955-04-15 | 1962-07-24 | Buckbee Mears Co | Abrading devices and method of making them |
US3081525A (en) * | 1959-09-03 | 1963-03-19 | Gen Am Transport | Methods of making printed electric circuits |
US3268378A (en) * | 1964-12-16 | 1966-08-23 | Frank W Broderick | Method of preparing mated embossing rolls |
-
1914
- 1914-02-10 US US817914A patent/US1329088A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2887042A (en) * | 1955-03-22 | 1959-05-19 | Eastern Engraving And Machine | Embossing rolls and product thereof |
US3045321A (en) * | 1955-04-15 | 1962-07-24 | Buckbee Mears Co | Abrading devices and method of making them |
US3081525A (en) * | 1959-09-03 | 1963-03-19 | Gen Am Transport | Methods of making printed electric circuits |
US3268378A (en) * | 1964-12-16 | 1966-08-23 | Frank W Broderick | Method of preparing mated embossing rolls |
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