GB941442A - Improvements in or relating to the electrochemical treatment of metallic surfaces - Google Patents
Improvements in or relating to the electrochemical treatment of metallic surfacesInfo
- Publication number
- GB941442A GB941442A GB2164060A GB2164060A GB941442A GB 941442 A GB941442 A GB 941442A GB 2164060 A GB2164060 A GB 2164060A GB 2164060 A GB2164060 A GB 2164060A GB 941442 A GB941442 A GB 941442A
- Authority
- GB
- United Kingdom
- Prior art keywords
- potential difference
- photographic film
- electrolyte
- gelatine
- metallic surfaces
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/02—Electroplating of selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/14—Etching locally
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F5/00—Electrolytic stripping of metallic layers or coatings
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
Metallic surfaces, such as comprising copper covered with a thin protective coating of chromium, are electro-chemically treated, e.g. by subjecting the surfaces to anodic oxidation or dissolution or cathodic reduction or deposition, using a potential difference to displace the ions through a photographic film emulsion layer previously applied to the surfaces, e.g. by conventional rotogravure processes, giving a non-uniformly permeable resist whose permeability varies over a continuous range. In electrolytic etching, the metallic surface, which may be a printing block with a coating of silver or bichromated gelatine matrix previously exposed through a photographic film, constitutes the anode and is immersed between copper cathodes in a hydroscopic electrolyte, either employed alone or in the form of concentrated solutions such as LiCl, CaCl2, MgCl2 ZnCl2, FeCl3, CuCl2, KOOC.CH3, NaHSO4, KSCN, Na2Cr2O7 and CrO3. This electrolyte may b inert to the metal in the absence of an electric current, or may be capable of chemical attack and effecting electrolysis in which case a "positive" or "negative" potential difference is applied to increase or decrease the intensity of the treatment. Dialysis of the gelatine may be slowed down by adding tanning products such as formaldehyde, tannin or glyoxal to the bath. The process may also be applied to the decoration of aluminium objects, the manufacture of medals and matrices for gramophone records, and the engraving of punches.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR797865A FR1239951A (en) | 1959-06-18 | 1959-06-18 | Electrolytic metal treatment process |
Publications (1)
Publication Number | Publication Date |
---|---|
GB941442A true GB941442A (en) | 1963-11-13 |
Family
ID=8716186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2164060A Expired GB941442A (en) | 1959-06-18 | 1960-06-20 | Improvements in or relating to the electrochemical treatment of metallic surfaces |
Country Status (4)
Country | Link |
---|---|
FR (1) | FR1239951A (en) |
GB (1) | GB941442A (en) |
LU (1) | LU38825A1 (en) |
NL (1) | NL252804A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113376097A (en) * | 2021-06-08 | 2021-09-10 | 厦门大学 | High-reproducibility preparation method of nano-silver needle tip |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3117322B2 (en) * | 1993-04-05 | 2000-12-11 | 富士写真フイルム株式会社 | Method for producing photosensitive lithographic printing plate and its support |
-
0
- NL NL252804D patent/NL252804A/xx unknown
-
1959
- 1959-06-18 FR FR797865A patent/FR1239951A/en not_active Expired
-
1960
- 1960-06-15 LU LU38825D patent/LU38825A1/xx unknown
- 1960-06-20 GB GB2164060A patent/GB941442A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113376097A (en) * | 2021-06-08 | 2021-09-10 | 厦门大学 | High-reproducibility preparation method of nano-silver needle tip |
Also Published As
Publication number | Publication date |
---|---|
LU38825A1 (en) | 1960-08-16 |
FR1239951A (en) | 1960-09-02 |
NL252804A (en) |
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