[go: up one dir, main page]

GB423046A - Improvements in or relating to the manufacture of safety paper and like materials - Google Patents

Improvements in or relating to the manufacture of safety paper and like materials

Info

Publication number
GB423046A
GB423046A GB20880/33A GB2088033A GB423046A GB 423046 A GB423046 A GB 423046A GB 20880/33 A GB20880/33 A GB 20880/33A GB 2088033 A GB2088033 A GB 2088033A GB 423046 A GB423046 A GB 423046A
Authority
GB
United Kingdom
Prior art keywords
paper
unsubstituted
july
represents hydrogen
materials
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
Application number
GB20880/33A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB423046A publication Critical patent/GB423046A/en
Expired legal-status Critical Current

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

  • Paper (AREA)

Abstract

423,046. Security paper. DU PONT DE NEMOURS & CO., E. I., Wilmington, Delaware, U.S.A. July 24, 1933, No. 20880. Convention date, July 22, 1932. [Class 96] Paper, parchment, &c., for cheques, deeds, &c. is made sensitive to ink - eradicating chemicals, by incorporating with the paper pulp in the beating-engine, or by adding to paper, in solution or in suspension with sizing materials, or by dipping, or during calendering, an aminoarylothiazole having the general formula in which R represents an o-arylene group which may be unsubstituted or may carry substituents, e.g. halogens, alkyl, alkoxyl, amino, nitro, and sulphonic groups, and A represents hydrogen, or an unsubstituted or substituted alkyl, aryl or alkaryl group ; salts of the above may bo used, e.g. the hydrochloride, hydrobromide, sulphate, phosphate, formate, acetate, or oxalate. The unsubstituted amino compounds, i.e. those in which A represents hydrogen are preferred because of their greater solubility and fastness to light. Examples of benzthiazoles and #-naphthathiazoles which are stated to be particularly satisfactory are given.
GB20880/33A 1932-07-22 1933-07-24 Improvements in or relating to the manufacture of safety paper and like materials Expired GB423046A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US624053A US2061632A (en) 1932-07-22 1932-07-22 Safety paper and the like

Publications (1)

Publication Number Publication Date
GB423046A true GB423046A (en) 1935-01-24

Family

ID=24500452

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20880/33A Expired GB423046A (en) 1932-07-22 1933-07-24 Improvements in or relating to the manufacture of safety paper and like materials

Country Status (2)

Country Link
US (1) US2061632A (en)
GB (1) GB423046A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478681A (en) * 1981-08-14 1984-10-23 Bayer Aktiengesellschaft Forgery-proof paper
US5139812A (en) * 1989-07-07 1992-08-18 Bioprobe Systems Method and apparatus for high security crypto-marking for protecting valuable objects
WO2013064806A1 (en) 2011-10-31 2013-05-10 Aidc Global Limited Identification arrangement

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695298A (en) * 1954-11-23 Fast bases of the azole series
US3437555A (en) * 1965-12-03 1969-04-08 Du Pont Composition for rendering paper forgery-proof and forming paper therewith
ATE296814T1 (en) * 1999-05-12 2005-06-15 Neurosearch As ION CHANNEL MODULATING AGENTS
CA2640085C (en) * 2006-02-01 2011-11-01 Daniel Adam Polakow A sanitary indicator
MX371022B (en) 2010-12-08 2020-01-13 Georgia Pacific Nonwovens Llc Dispersible nonwoven wipe material.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478681A (en) * 1981-08-14 1984-10-23 Bayer Aktiengesellschaft Forgery-proof paper
US5139812A (en) * 1989-07-07 1992-08-18 Bioprobe Systems Method and apparatus for high security crypto-marking for protecting valuable objects
WO2013064806A1 (en) 2011-10-31 2013-05-10 Aidc Global Limited Identification arrangement

Also Published As

Publication number Publication date
US2061632A (en) 1936-11-24

Similar Documents

Publication Publication Date Title
US2704710A (en) Precipitation of azo dyes in silver halide emulsions by means of guanidine and biguanide compounds containing long alkyl chains
GB423046A (en) Improvements in or relating to the manufacture of safety paper and like materials
GB536939A (en) Improvements in and relating to photographic colour development
GB1274545A (en) DERIVATIVES OF 4,4'-BIS(s-TRIAZINYLAMINO)-STILBENE-2,2'-DISULPHONIC ACID, AND PROCESSES FOR THEIR MANUFACTURE AND USE AS OPTICAL BRIGHTENERS
JP2918937B2 (en) Concentrated dye solution
GB1137580A (en) Improvements in or relating to photographic silver halide emulsions
US2809123A (en) Fibrous synthetic material of improved whiteness
GB508073A (en) Improvements in or relating to the stabilisation of photographic emulsions
GB1243276A (en) Novel triazinyl stilbene derivatives
GB1044734A (en) Optically sensitized photographic silver halide emulsions
US2298401A (en) Treatment of textile material
GB1121947A (en) Improvements relating to the dyeing or printing of synthetic fibre materials, and such materials so treated
GB1092025A (en) New anthraquinone dyes and their production
GB1110158A (en) Improvements relating to monoazo dyestuffs which are difficultly soluble in water and their use for dyeing hydrophobic organic fibres
GB543685A (en) Process of treating animal fibres with quaternary cyclic compounds
GB505979A (en) Manufacture of sensitised photographic silver halide emulsions
GB801275A (en) New photo-sensitizing dyestuffs and their manufacture and products containing them
GB1502048A (en) Cationic dyestuffs containing quaternary ammonium groups their manufacture and their use
US2363330A (en) Safety paper and preparation thereof
GB486010A (en) Improvements in dyeing textile fibres
GB546566A (en) Improvements in or relating to dyestuffs
GB712764A (en) Improvements in or relating to a process for improving the whiteness or colour of materials
GB1001199A (en) Azo dyes containing fluorine
GB1348190A (en) Anthraquinone dyestuffs their manufacture and use
GB1263539A (en) Basic dyestuffs and process for their manufacture