GB305028A - Process for the protection and authentification of deeds, cheques or any other documents, printed or manuscript, or any other objects - Google Patents
Process for the protection and authentification of deeds, cheques or any other documents, printed or manuscript, or any other objectsInfo
- Publication number
- GB305028A GB305028A GB2735/29A GB273529A GB305028A GB 305028 A GB305028 A GB 305028A GB 2735/29 A GB2735/29 A GB 2735/29A GB 273529 A GB273529 A GB 273529A GB 305028 A GB305028 A GB 305028A
- Authority
- GB
- United Kingdom
- Prior art keywords
- treatment
- hydrochloric acid
- ink
- indicator
- blue
- 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
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
Landscapes
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
305,028. Bayle, E., George, H., and MachÚ, A. Jan. 28, 1928, [Convention date]. Records.-Phonograph records are marked, in order to enable frauds to be detected, with an ink containing an indicator whose colour depends on its ionic state and which can be changed by treatment with different reagents, together with a mixture to render the indicator immune against atmospheric agents; alternatively, the coloured material may be incorporated in the material of the record. In an example, a violet ink is prepared by mixing together the chloro-zincic derivative of the bromo-ethylate of hexamethyl- and pentamethylmonoethylp-rosaniline, the sodium salt of otoluidine-dia.zo - bi - 1-naphthylamine-4-sulphonic acid, sodium dihydrogen orthophosphate, soda, glycerine, and a thin printing-ink varnish. The colour is changed as follows:-to green, by treatment with hydrochloric acid; to blue-green, by treatment with glycocol, salt, and hydrochloric acid; to blue-grey by treatment with hydrochloric acid and potassium biphthalate; to indigo, by treatment with sodium citrate and hydrochloric acid; and to violet, by treatment with boric acid and borax. One or more of the indicator materials may be incorporated in the reagent instead of adding them all to the ink.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR305028X | 1928-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB305028A true GB305028A (en) | 1930-03-27 |
Family
ID=8888831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2735/29A Expired GB305028A (en) | 1928-01-28 | 1929-01-26 | Process for the protection and authentification of deeds, cheques or any other documents, printed or manuscript, or any other objects |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB305028A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE852880C (en) * | 1950-07-29 | 1952-10-20 | Land Und Stadt Berlin | Water-insoluble fixing agents, e.g. B. paints, as a carrier of an inconspicuous security feature |
| FR2315132A1 (en) * | 1975-06-20 | 1977-01-14 | Pelikan Werke Wagner Guenther | PROCEDURE FOR THE PROTECTION AGAINST THE FALSIFICATION OF SECURITIES AND DOCUMENTS OF SIMILAR VALUE |
-
1929
- 1929-01-26 GB GB2735/29A patent/GB305028A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE852880C (en) * | 1950-07-29 | 1952-10-20 | Land Und Stadt Berlin | Water-insoluble fixing agents, e.g. B. paints, as a carrier of an inconspicuous security feature |
| FR2315132A1 (en) * | 1975-06-20 | 1977-01-14 | Pelikan Werke Wagner Guenther | PROCEDURE FOR THE PROTECTION AGAINST THE FALSIFICATION OF SECURITIES AND DOCUMENTS OF SIMILAR VALUE |
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