GB421217A - Method of preparing aluminium and zinc lithographic plates for planographic and off-set printing - Google Patents
Method of preparing aluminium and zinc lithographic plates for planographic and off-set printingInfo
- Publication number
- GB421217A GB421217A GB2802533A GB2802533A GB421217A GB 421217 A GB421217 A GB 421217A GB 2802533 A GB2802533 A GB 2802533A GB 2802533 A GB2802533 A GB 2802533A GB 421217 A GB421217 A GB 421217A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zinc
- aluminium
- minutes
- solution
- printing
- 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
Links
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
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/04—Printing plates or foils; Materials therefor metallic
- B41N1/08—Printing plates or foils; Materials therefor metallic for lithographic printing
-
- 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
- B41N3/03—Chemical or electrical pretreatment
- B41N3/034—Chemical or electrical pretreatment characterised by the electrochemical treatment of the aluminum support, e.g. anodisation, electro-graining; Sealing of the anodised layer; Treatment of the anodic layer with inorganic compounds; Colouring of the anodic layer
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
421,217. Printing surfaces. WOLF, O., 20, Halbgasse, Vienna. Oct. 11, 1933, No. 28025. [A Specification was laid open to inspection under Sect. 91 of the Acts, April 14, 1934.] [Class 100 (ii)] [See also Groups XX and XXXVI] Lithographic plates which are also suitable for offset printing are prepared by producing upon smooth ungrained plates of aluminium, zinc, and their alloys, before the application of a printing impression, a lithographic stone-like coating of the compounds of the metal of the plates by anodic electrolytic treatment. The voltage employed is a low direct current or alternating current voltage of less than 40 volts, and the electrolyte consists in the case of zinc and its alloys of a saturated solution of an alkali carbonate, with a current density of 2 to 3 amp/dm<2> for 10 to 30 minutes, and in the case of aluminium and its alloys of a <1>/3 to 5 per cent solution of a dilute acid such as nitric acid which does not dissolve the metal or its oxide, with a current density of 1 to 2 amp/dm<2> for 10 to 30 minutes. Examples given are : (a) for aluminium, ¢ per cent nitric acid, 1 to 2 amp /dm<2> with 7 to 10 volts A.C. for 15 to 20 minutes ; (b) for zinc, a saturated (37 per cent) solution of potassium carbonate solution, 2 to 3 amp/dm<2> with 10 to 12 volts D.C. for 10 to 12 minutes. After the formation of the coating, the surface is washed with dilute acetic or nitric acid, if zinc is used, or with water if aluminium is employed. The design is produced subsequently to the coating by transfer, drawing, e.g. in chalk or pencil, by a photomechanical process, or in any other way, and etching agents in the wetting fluid during the subsequent printing are unnecessary. Specifications 6701/00, 21322 /04, [both in Class 100], 223,994, 290,901, [both in Class 41], and 401,579 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT9168432 | 1932-10-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB421217A true GB421217A (en) | 1934-12-17 |
Family
ID=3683033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2802533A Expired GB421217A (en) | 1932-10-12 | 1933-10-11 | Method of preparing aluminium and zinc lithographic plates for planographic and off-set printing |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE405996A (en) |
CH (1) | CH181265A (en) |
DE (1) | DE700726C (en) |
FR (1) | FR776246A (en) |
GB (1) | GB421217A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3658662A (en) * | 1969-01-21 | 1972-04-25 | Durolith Corp | Corrosion resistant metallic plates particularly useful as support members for photo-lithographic plates and the like |
-
1933
- 1933-04-25 DE DE1933W0091684 patent/DE700726C/en not_active Expired
- 1933-10-10 FR FR776246D patent/FR776246A/en not_active Expired
- 1933-10-11 GB GB2802533A patent/GB421217A/en not_active Expired
-
1934
- 1934-10-31 BE BE405996D patent/BE405996A/xx unknown
- 1934-10-31 CH CH181265D patent/CH181265A/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR776246A (en) | 1935-01-18 |
DE700726C (en) | 1940-12-28 |
BE405996A (en) | 1934-11-30 |
CH181265A (en) | 1935-12-15 |
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