US1863002A - Process for grinding etching plates made of magnesium alloys for planographic printing - Google Patents
Process for grinding etching plates made of magnesium alloys for planographic printing Download PDFInfo
- Publication number
- US1863002A US1863002A US379870A US37987029A US1863002A US 1863002 A US1863002 A US 1863002A US 379870 A US379870 A US 379870A US 37987029 A US37987029 A US 37987029A US 1863002 A US1863002 A US 1863002A
- Authority
- US
- United States
- Prior art keywords
- magnesium alloys
- grinding
- plates made
- planographic printing
- parts
- 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
- 238000005530 etching Methods 0.000 title description 9
- 229910000861 Mg alloy Inorganic materials 0.000 title description 8
- 238000000034 method Methods 0.000 title description 6
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 229910001651 emery Inorganic materials 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007775 late Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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
- B41N3/04—Graining or abrasion by mechanical means
Definitions
- This invention relates to a process for treating etching plates made of magnesium a1- loys for planographic or lithographic plates.
- the metal plates for planographic printing are supplied to the user in a highly polished condition to ensure that they are perfectly suitable for use.
- the sensitized printing film does not easily adhere to such highly polished surfaces, and it is therefore necessary to reduce the polish to some extent and sometimes also to remove a certain fatty film.
- this is usually effected by grinding them with a suspension of fine cleansing powders, such as emery, levigated chalk or the like, in water; and also, in many instances, by a slight preliminary etching the plates being treated, for a short time, with a very weak aqueous solution of nitric acid.
- the plates can be etched, with complete suppression of the liberation of hydrogen due to a kind of etching effect of the water, if the cleansing powders used in the treatment are mixed with bichromate.
- the bichromate may be present in these mixtures in excess of the quantity corresponding to its solubility in water.
- the rinsing operation is also preferably performed with water containing bichromate, for instance, 1% of ammoniumbichromate. After this preliminary treatment, the copying layer will be entirely free from bubbles.
- Polishing compositions according to our invention may have, for example, the followihg compositions:
- Said standard-compositions may be made ready for use by adding water in a quantity sufiicient to make a solution containing at least about 0.3% of bichromate.
- the new process constitutes an improvement in so far as it is based on the further discovery that the liberation of hydrogen is caused by the preparatory treatment, and can therefore be prevented only by suitably modifying said preparatory treatment.
- a composition for grinding etching plates of magnesium alloys comprising a grinding medium and a water soluble bichromate.
- a composition for grinding etching plates of magnesium alloys comprising a grinding medium and a water soluble bichromate, the bichromate contents ranging from about 3 parts. to about parts to 100 parts of said grindin medium.
- a composltion for grinding etching plates of magnesium alloys comprising a mixture of approximatel parts of emery powder and parts of evigated chalk and 65 parts of a 10% aqueous solution of biehromate of ammonium.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Printing Plates And Materials Therefor (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI0035051 | 1928-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1863002A true US1863002A (en) | 1932-06-14 |
Family
ID=7188876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US379870A Expired - Lifetime US1863002A (en) | 1928-07-25 | 1929-07-20 | Process for grinding etching plates made of magnesium alloys for planographic printing |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1863002A (enrdf_load_stackoverflow) |
| BE (1) | BE361260A (enrdf_load_stackoverflow) |
| FR (1) | FR671500A (enrdf_load_stackoverflow) |
| GB (1) | GB316207A (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3429080A (en) * | 1966-05-02 | 1969-02-25 | Tizon Chem Corp | Composition for polishing crystalline silicon and germanium and process |
-
0
- BE BE361260D patent/BE361260A/xx unknown
-
1929
- 1929-03-07 GB GB7534/29A patent/GB316207A/en not_active Expired
- 1929-03-15 FR FR671500D patent/FR671500A/fr not_active Expired
- 1929-07-20 US US379870A patent/US1863002A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3429080A (en) * | 1966-05-02 | 1969-02-25 | Tizon Chem Corp | Composition for polishing crystalline silicon and germanium and process |
Also Published As
| Publication number | Publication date |
|---|---|
| GB316207A (en) | 1930-01-23 |
| BE361260A (enrdf_load_stackoverflow) | |
| FR671500A (fr) | 1929-12-13 |
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