GB469023A - Improvements in and relating to security paper - Google Patents
Improvements in and relating to security paperInfo
- Publication number
- GB469023A GB469023A GB137836A GB137836A GB469023A GB 469023 A GB469023 A GB 469023A GB 137836 A GB137836 A GB 137836A GB 137836 A GB137836 A GB 137836A GB 469023 A GB469023 A GB 469023A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- mesh sieve
- finely divided
- security paper
- calcium
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
- D21H21/46—Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators
Landscapes
- Catalysts (AREA)
- Fertilizers (AREA)
Abstract
469,023. Security paper. RUSSELL, D. Jan. 16, 1936, No. 1378. Addition to 437,969. [Class 96] The reaction metal or metal oxide disclosed in the parent Specification is so finely divided that it all passes through a 240 mesh sieve, or all through a 200 mesh sieve and 90 per cent or more through a 300 mesh sieve. The metal &c. may be used wholly or mainly in an inner ply of a multiple-ply paper, or coarser metal &c. may be used therein; adjacent plies may contain other security materials, e.g. reacting with the metal or oxide. Examples specify ferrocyanides of manganese, lead, zinc, or calcium, calcium thiocyanate, ferric hydroxide, as well as finely divided iron, copper, nickel, or cobalt.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB137836A GB469023A (en) | 1936-01-16 | 1936-01-16 | Improvements in and relating to security paper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB137836A GB469023A (en) | 1936-01-16 | 1936-01-16 | Improvements in and relating to security paper |
Publications (1)
Publication Number | Publication Date |
---|---|
GB469023A true GB469023A (en) | 1937-07-16 |
Family
ID=9720962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB137836A Expired GB469023A (en) | 1936-01-16 | 1936-01-16 | Improvements in and relating to security paper |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB469023A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005003458A1 (en) * | 2003-07-07 | 2005-01-13 | Landqart | Security paper and method for the production thereof |
CN102174785A (en) * | 2009-09-16 | 2011-09-07 | 保定钞票纸业有限公司 | Alteration resistant paper and preparation method thereof |
EP1687484B2 (en) † | 2003-10-15 | 2014-08-06 | Arjowiggins Security | Multi-layer security paper |
-
1936
- 1936-01-16 GB GB137836A patent/GB469023A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005003458A1 (en) * | 2003-07-07 | 2005-01-13 | Landqart | Security paper and method for the production thereof |
CH696744A5 (en) * | 2003-07-07 | 2007-11-15 | Landqart | Security paper and method for its production. |
EP1687484B2 (en) † | 2003-10-15 | 2014-08-06 | Arjowiggins Security | Multi-layer security paper |
US9464385B2 (en) | 2003-10-15 | 2016-10-11 | Arjowiggins Security | Multi-layer security paper |
CN102174785A (en) * | 2009-09-16 | 2011-09-07 | 保定钞票纸业有限公司 | Alteration resistant paper and preparation method thereof |
CN102174785B (en) * | 2009-09-16 | 2013-05-22 | 保定钞票纸业有限公司 | Alteration resistant paper and preparation method thereof |
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