GB709315A - Improvements in or relating to the etching of metal objects - Google Patents
Improvements in or relating to the etching of metal objectsInfo
- Publication number
- GB709315A GB709315A GB3428/52A GB342852A GB709315A GB 709315 A GB709315 A GB 709315A GB 3428/52 A GB3428/52 A GB 3428/52A GB 342852 A GB342852 A GB 342852A GB 709315 A GB709315 A GB 709315A
- Authority
- GB
- United Kingdom
- Prior art keywords
- petroleum
- weight
- etching
- nitric acid
- feb
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/42—Aqueous compositions containing a dispersed water-immiscible liquid
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
709,315. Etching. DOW CHEMICAL CO Feb. 8, 1952 [Feb. 12,1951], No. 3428/52. Class 100 (2) An etching bath for etching an acid-soluble metal, e.g. in making a printing plate, comprises a mixture of a petroleum sulphate having from 18 to 30 carbon atoms, a liquid petroleum fraction boiling in the range 90‹ C. - 390‹ C., and an aqueous solution containing nitric acid. Preferably the nitric acid solution contains between 5 per cent and 10 per cent of HNO, by weight, the weight of the petroleum fraction being at least 1.3 times the weight of the petroleum sulphonate, but not more than 0.15 times the weight of the aqueous nitric acid solution. The petroleum sulphonates used may be the petroleum sulphonic acids and salts thereof, e.g. naphthenic soaps or mahogany soaps. The preferred sulphonates have 24-26 carbon atoms, the sodium salts having the empirical formula CxHySO 3 Na where y = 2x - 10. Examples of petroleum fractions used are gasoline, benzine, kerosene, coal oil, and lubricating oil. Inclusion of the petroleum sulphonate and petroleum fraction increases the ratio of the depth of the etch to the amount of lateral attack on the metal underlying the parts of the plate coated with a resist. The composition may be splashed against the plate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US709315XA | 1951-02-12 | 1951-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB709315A true GB709315A (en) | 1954-05-19 |
Family
ID=22098218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3428/52A Expired GB709315A (en) | 1951-02-12 | 1952-02-08 | Improvements in or relating to the etching of metal objects |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB709315A (en) |
-
1952
- 1952-02-08 GB GB3428/52A patent/GB709315A/en not_active Expired
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