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US2777780A - Method of desensitizing clay-coated record sheet - Google Patents

Method of desensitizing clay-coated record sheet Download PDF

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Publication number
US2777780A
US2777780A US467792A US46779254A US2777780A US 2777780 A US2777780 A US 2777780A US 467792 A US467792 A US 467792A US 46779254 A US46779254 A US 46779254A US 2777780 A US2777780 A US 2777780A
Authority
US
United States
Prior art keywords
color
sheet
desensitizing
adsorbent
particles
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
Application number
US467792A
Inventor
Marjorie J Cormack
Ned A Thacker
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.)
NCR Voyix Corp
National Cash Register Co
Original Assignee
NCR Corp
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
Priority to NL201815D priority Critical patent/NL201815A/xx
Priority to BE542642D priority patent/BE542642A/xx
Priority to NL105550D priority patent/NL105550C/xx
Application filed by NCR Corp filed Critical NCR Corp
Priority to US467792A priority patent/US2777780A/en
Priority to GB29651/55A priority patent/GB773180A/en
Priority to DEN11407A priority patent/DE1022606B/en
Priority to FR1136491D priority patent/FR1136491A/en
Application granted granted Critical
Publication of US2777780A publication Critical patent/US2777780A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41LAPPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L1/00Devices for performing operations in connection with manifolding by means of pressure-sensitive layers or intermediaries, e.g. carbons; Accessories for manifolding purposes
    • B41L1/20Manifolding assemblies, e.g. book-like assemblies
    • B41L1/22Manifolding assemblies, e.g. book-like assemblies made up of single sheets or forms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/124Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • B41M5/128Desensitisers; Compositions for fault correction, detection or identification of the layers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00Printing
    • Y10S101/29Printing involving a color-forming phenomenon

Definitions

  • nd sheet is coated with a composition containing the ad- When Writing or printing pressures are on the rear surface is ruptured locally and releases the oil droplets at the pressure points, which droplets are adsorbed by the adsorbent particles on the front surface of the second sheet.
  • This manifold system is workable with the rupturable oil-droplet-containing film.
  • Fig. 1 is a representation of a three-sheet manifold form with corners of the sheets turned up to allow a designation of the coatings to be made;
  • Fig. 2 is a representation of the top surface of the top sheet
  • Fig. 3 is a representation of the top surface of the middle sheet, showing a desensitized area
  • Fig. 4 is a representation of the top surface of a bottom sheet not desensitized.
  • the attapulgite, the zeolite material, kaolin, and pyrophyllite act as oxidizers for benzoyl leuco methylene blue and Michlers hydrol.
  • the sensitization of a sheet need not be made by one of these adsorbents alone, as mixtures of them may be used.
  • the adsorbent or adsorbents used are applied in fine ganic color-reactant material.
  • Aliphatic or aryl amine acetates such as n-dodecylamine acetate, in which the aliphatic or aryl groups are higher than the octyl group.
  • Amines and diamines of high such as:
  • Substituted oxazoline such as: (1) 2,4,4 trimethyl-Z-oxazoline; or V (2) 2-oleyl, 4-hydromethyl 4 methyl-Z-oxazoline.
  • oil tint base vehicle composed of a mixture of linseed oil varnish and resinous binders 25 pts. 2,4,4 trimethyl-Z-oxazoline 10 pts. dodecyl trimethylamminoum chloride
  • the oil base vehicle chosen should preferably be transparent in their films, so that the desensitizing ink will not obliterate any data previously printed in the area to be desensitized. However, if such obliteration is required, an opacifier, such as titanium dioxide, may be added.
  • the type of oil vehicle used is chosen for the particular printing process used to apply it. Reference is made to the publication Printing and Litho Inks, by Herbert J.
  • the des'ensitizing materials may be applied to the record material alone or dissolved in a volatile solvent if a printing ink vehicle is not required.
  • the :amounts of desensitizer used are not critical in any respect except that enough should be used to substantially deactivate the active and exposed surfaces of the sensitizing particles.
  • adsorbate compounds other than 3,3 bis (pdimethylaminophenyl) G-dimethylamino phthalide which is color-reactive with the mentioned adsorbent materials are 3,3 bis (p-diethylaminophenyl) 6-diethylamino phthalide; 3,3 bis (p-dimethylaminophenyl) phthalide;
  • Fig. 1 represents a threesheet statement form bound at the top 20, the first sheet being an original which contains an area '21 for the customers name and address; and an area 22 for the cost data and selling price data, as indicated.
  • the rear of the first, or top, sheet is coated with a rupturable gelled hydrophilic colloid film 23, containing the droplets of oily fluid containing the color-reactant.
  • the second sheet which is the customers copy (Fig. 3), has on its top surface 24 the adsorbent sensitizing particles, 'but in the area 25 it has been desensitized by one or more of the specified desensitizing compounds.
  • the rear surface 26 of the second sheet is coated with the oil-droplet-containing film, as film 23, on the rear of the front sheet.
  • the front surface 27 of the bottom sheet is the same as surface 24 of the second sheet.
  • the matter printed on the top sheet appears on'each of'the two undersheets ex cept in the desensitized area 25 of the second sheet.
  • the desensitizing compounds are chosen not for any reactant effect on the organic color-reactant but only for their deactivating efiect on the adsorbent. Hence they are equivalents in being highly polar, non-volatile, deactivating agents.

Landscapes

  • Color Printing (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Description

METHOD OF DESENSITIZING CLAY-COATED RECORD SHEET Filed Nov. 9, 1954 2 2] STATEMENT JOHN DOE 35 MAIN ADSORBENT SENSI- TIZING PARTICLES cosT SELLING PRICE 14.00 25.00 22 23 I I 26 j r \OOLORLESS qReAmc (24 COLOR REAG ANT F'GQZ 20 20 FIG. 3 L L STATEMENT STATEMENT JOHN DOE JOHN DOE 35 MAIN ST. 35 MAIN ST. COST SELLING PRICE SELLING PRICE |4.00 25.00 25.00
ORIGINAL cusToMERs COPY \25 DESENSITIZED AREA 24' 20 FIG. 4
STATEMENT JOHN DOE 35 MAIN ST.
cos'r SELLING PRICE i400 25.00 -27 INVENTORS MARJORIE J. CORMACK NED A. THACKER BY FILE COPY g j m y Qim THEIR ATTORNEYS United rates METHOD OF DESENSITIZING CLAY-COATED RECORD SHEET Marjorie J. Cormack and Ned A. Thacker, Dayton, Ohio, assignors to The National Cash Register Company, Daygttzigj Ohio, a corporation of Maryland (incorporated in 1 Application November 9, 1954, Serial No. 467,792 4 Claims. (Cl. 117-36) Reference is made to United States Letters Patent No. 2,548,366, which issued April 10, 1951, on the application of Barrett K. manifold record material sensitized with such adsorbent particles.
nd sheet is coated with a composition containing the ad- When Writing or printing pressures are on the rear surface is ruptured locally and releases the oil droplets at the pressure points, which droplets are adsorbed by the adsorbent particles on the front surface of the second sheet. This manifold system is workable with the rupturable oil-droplet-containing film.
As is Well known, it is often desirable not to have some of the data recorded on the top sheet of a manifold pack appear on certain parts of certain of the inner sheets. By this invention, the appearance of data on any 2,777,780 Patented Jan. 15, 1957 stances or substances which contribute to transparency, or colored materials to match a tinted paper.
Therefore, it is an object of this invention to provide to the drawing which accompanies and forms a part of this specification.
Of the drawing:
Fig. 1 is a representation of a three-sheet manifold form with corners of the sheets turned up to allow a designation of the coatings to be made;
Fig. 2 is a representation of the top surface of the top sheet;
Fig. 3 is a representation of the top surface of the middle sheet, showing a desensitized area; and
Fig. 4 is a representation of the top surface of a bottom sheet not desensitized.
Of the many adsorbent materials which are capable of acting as electron acceptor color-reactants, the following may be mentioned:
1. Attapulgite. 2. Kaolin. 3. Pyrophyllite.
I 4. Sodium aluminum zeolite material.
5. Bentonite.
6. Halloysite.
7. Calcium sulfate.
8. Zinc sulfate. v
9. Calcium citrate.
10. Zirconium dioxide.
11. Barium sulfate.
12. Calcium fluoride.
l3. Magnesium tri-silicate.
In addition, the attapulgite, the zeolite material, kaolin, and pyrophyllite act as oxidizers for benzoyl leuco methylene blue and Michlers hydrol. The sensitization of a sheet need not be made by one of these adsorbents alone, as mixtures of them may be used.
The adsorbent or adsorbents used are applied in fine ganic color-reactant material. I
The adsorbent surface activity of the mentioned com- Cationic quaternary ammonium salts of the follow- (a) Alkyl trimethyl ammonium chlorides of the gen eral formula R-N(CH3)3C1, where R is any long chain alkyl group higher than the octyl grou such as:
(b) Aryl trimethyl ammonium chlorides of the general formula R-N(CI-Ia)aCl, where R is an aryl. group, such (1) Benzyl trimethyl ammonium chloride (c) Dialkyl dimethyl ammonium chloride'of the general formula R2N(CH3)zCl, where R is any long alkyl group higher than the octyl group, such as:
(l) Dicoconut dimethyl ammonium chloride (2) Di-hydrogenated tallow dimethyl'ammonium chloride (3) Di-lauryl dimethyl ammonium chloride Of these quaternary ammonium salts, there also are the bromide, iodide, and acetate equivalents of the mentioned chlorides.
II. Aliphatic or aryl amine acetates, such as n-dodecylamine acetate, in which the aliphatic or aryl groups are higher than the octyl group.
III. Amines and diamines of high such as:
molecular weight,
(1) Dodecyl amine; and (2) Dodecyl diarnine.
IV. Substituted oxazoline, such as: (1) 2,4,4 trimethyl-Z-oxazoline; or V (2) 2-oleyl, 4-hydromethyl 4 methyl-Z-oxazoline.
50 pts. oil tint base vehicle composed of a mixture of linseed oil varnish and resinous binders 25 pts. 2,4,4 trimethyl-Z-oxazoline 10 pts. dodecyl trimethylamminoum chloride The oil base vehicle chosen should preferably be transparent in their films, so that the desensitizing ink will not obliterate any data previously printed in the area to be desensitized. However, if such obliteration is required, an opacifier, such as titanium dioxide, may be added. The type of oil vehicle used is chosen for the particular printing process used to apply it. Reference is made to the publication Printing and Litho Inks, by Herbert J. Wolfe, fourth edition, published by MacNair-Dorland Company, New York city, in 1949, where in chapter III a number of oil base printing ink vehicles are specified. Another publication pertaining to printing ink vehicles is chapter #3 of the publication Printing Inks, by Carleton Ellis, published by Reinhold Publishing Corporation, New York city, in 1940.
The des'ensitizing materials may be applied to the record material alone or dissolved in a volatile solvent if a printing ink vehicle is not required. The :amounts of desensitizer used are not critical in any respect except that enough should be used to substantially deactivate the active and exposed surfaces of the sensitizing particles.
Among adsorbate compounds other than 3,3 bis (pdimethylaminophenyl) G-dimethylamino phthalide which is color-reactive with the mentioned adsorbent materials are 3,3 bis (p-diethylaminophenyl) 6-diethylamino phthalide; 3,3 bis (p-dimethylaminophenyl) phthalide;
Xanthene-9, o-benzoic acid, 3,6-bis-diethylamino-9-p-nitroanilino-lactam; and
2,4 bis [p-(dimethylaminophenylazo) anilino1-6-hydroxy sym. triazine.
Referring to the drawing, Fig. 1 represents a threesheet statement form bound at the top 20, the first sheet being an original which contains an area '21 for the customers name and address; and an area 22 for the cost data and selling price data, as indicated. The rear of the first, or top, sheet is coated with a rupturable gelled hydrophilic colloid film 23, containing the droplets of oily fluid containing the color-reactant. The second sheet, which is the customers copy (Fig. 3), has on its top surface 24 the adsorbent sensitizing particles, 'but in the area 25 it has been desensitized by one or more of the specified desensitizing compounds. The rear surface 26 of the second sheet is coated with the oil-droplet-containing film, as film 23, on the rear of the front sheet. The front surface 27 of the bottom sheet is the same as surface 24 of the second sheet. The matter printed on the top sheet appears on'each of'the two undersheets ex cept in the desensitized area 25 of the second sheet. The foregoing practical example shows the simplest method of applying the invention to a business form. The desensitization may be in differently placed areas on different undersheets if desired.
The desensitizing compounds are chosen not for any reactant effect on the organic color-reactant but only for their deactivating efiect on the adsorbent. Hence they are equivalents in being highly polar, non-volatile, deactivating agents.
While the method and means of this been described in connection with a number of examples of pertinent materials, it is not intended to confine the invention to such, as there are many equivalent materials.
What is claimed is:
1. The method of deactivating portions of record material sensitized with minute particles of inorganic adsorbent electron acceptor materials which cause the formation of color in an electron donor aromatic double bond color-reactant compound adsorbed thereon, by reason of an electron donor-acceptor color reaction which converts said compound to a more highly polarized conjugated form, giving it a distinctive color, including the step of applying to selected areas of the sensitized record material, before any of the organic color-reactant is applied, highly polar, non-volatile non-colo'r-forming adsorbate material sufiicient to occupy the normally available adsorbent sites on the particles of such areas.
2. The method of claim 1 in which the highly polar deactivating adsorbate is applied as a dispersion in a fluid printing vehicle. a
3. The method of claim 1 in which the highly polar deactivating adsorbate used is substantially colorless.
4. The method of claim 1 in which the highly polar deactivating adsorbate is substantially colorless and is applied dispersed in a substantially colorless fluid printing vehicle.

Claims (1)

1. THE METHOD OF DEACTIVATING PORTIONS OF RECORD MATERIAL SENSITIZED WITH MINUTE PARTICLES OF INORGANIC ADSORBENT ELECTRON ACCEPTOR MATERIAL WHICH CAUSE THE FORMATION OF COLOR IN AN ELECTRON DONOR AROMATIC DOUBLE BOND COLOR-REACTANT COMPOUND ADSORBED THEREON, BY REASON OF AN ELECTRON DONOR-ACCEPTOR COLOR REACTION WHICH CONVERTS SAID COMPOUND TO A MORE HIGHLY POLARIZED CONJUGATED FORM, GIVING IT A DISTINCTIV COLOR, INCLUDING THE STEP OF APPLYING TO SELECTED AREAS OF THE SENSITIZED RECORD MATERIAL, BEFORE ANY OF THE ORGANIC COLOR-FORMING ADPLIED, HIGHLY POLAR, NON-VOLATILE NON-COLOR-FORMING ADSORBATE MATERIAL SUFFICIENT TO OCCUPY THE NORMALLY AVAILABLE ADSORBENT SITES ON THE PARTICLES OF SUCH AREAS.
US467792A 1954-11-09 1954-11-09 Method of desensitizing clay-coated record sheet Expired - Lifetime US2777780A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL201815D NL201815A (en) 1954-11-09
BE542642D BE542642A (en) 1954-11-09
NL105550D NL105550C (en) 1954-11-09
US467792A US2777780A (en) 1954-11-09 1954-11-09 Method of desensitizing clay-coated record sheet
GB29651/55A GB773180A (en) 1954-11-09 1955-08-18 Pressure rupturable record material
DEN11407A DE1022606B (en) 1954-11-09 1955-11-04 Carbonless material
FR1136491D FR1136491A (en) 1954-11-09 1955-11-08 Recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US467792A US2777780A (en) 1954-11-09 1954-11-09 Method of desensitizing clay-coated record sheet

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US (1) US2777780A (en)
BE (1) BE542642A (en)
DE (1) DE1022606B (en)
FR (1) FR1136491A (en)
GB (1) GB773180A (en)
NL (2) NL105550C (en)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976062A (en) * 1958-01-07 1961-03-21 Brechner Hyman Apparatus for payroll system
US3058758A (en) * 1959-08-12 1962-10-16 Edward A Govatsos Checkbook
US3900218A (en) * 1972-08-30 1975-08-19 Fuji Photo Film Co Ltd Desensitizer composition
DE2445669A1 (en) * 1974-09-25 1976-04-01 Pelikan Werke Wagner Guenther Correcting fluid for colour reaction papers - comprises aq soln of quaternary ammonium cpd and/or amine
US3952117A (en) * 1973-08-08 1976-04-20 Fuji Photo Film Co., Ltd. Method of desensitizing
DE2634789A1 (en) * 1975-08-28 1977-03-10 Mead Corp Aqueous slurry, the process for its production and its use for the production of pressure-sensitive writing surfaces
US4012538A (en) * 1972-12-18 1977-03-15 Fuji Photo Film Co., Ltd. Method of forming color images employing desensitizing agents
US4021059A (en) * 1974-04-25 1977-05-03 Ciba-Geigy Corporation Production of images
US4023830A (en) * 1974-04-25 1977-05-17 Ciba-Geigy Corporation Production of images
US4039207A (en) * 1973-12-07 1977-08-02 Fuji Photo Film Co., Ltd. Recording sheet
US4078493A (en) * 1974-11-26 1978-03-14 Fuji Photo Film Co., Ltd. Desensitizing using dry reverse lithographic plate
US4125636A (en) * 1975-07-07 1978-11-14 Fuji Photo Film Co., Ltd. Desensitizing composition and desensitizing method
US4172727A (en) * 1975-02-17 1979-10-30 Fuji Photo Film Co., Ltd. Desensitizer compositions
US4199618A (en) * 1975-09-02 1980-04-22 Champion International Corporation Hidden entry system
DE3123509A1 (en) * 1981-06-13 1983-01-13 Geha-Werke Gmbh, 3000 Hannover Aqueous correction fluid for inks
DE3244801A1 (en) * 1981-12-04 1983-06-16 The Wiggins Teape Group Ltd., Basing View, Basingstoke, Hampshire RECORDING MATERIAL
US4411700A (en) * 1980-10-17 1983-10-25 Fuji Photo Film Co., Ltd. Desensitizer compositions
US4725315A (en) * 1985-05-31 1988-02-16 Fuji Photo Film Co., Ltd. Desensitizer composition for color developer sheet in pressure sensitive recording system contains a piperidine derivative
US4840927A (en) * 1985-09-09 1989-06-20 Fuji Photo Film Co., Ltd. Desensitizer composition
US4927971A (en) * 1988-05-11 1990-05-22 Mitsubishi Paper Mills Ltd. Desensitizer composition
US5880062A (en) * 1993-06-16 1999-03-09 Xerox Corporation Ink jet printing process for desensitizing carbonless paper
US20050053748A1 (en) * 2003-09-05 2005-03-10 Gore Makarand P. Metal salt activators for use in leuco dye compositions
US9092999B1 (en) * 2007-07-27 2015-07-28 David Harruff Container identification device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1147480A (en) * 1966-04-07 1969-04-02 Ncr Co A pressure-sensitive copying material
DE3506278A1 (en) * 1985-02-22 1986-08-28 Inst Zellstoff & Papier METHOD FOR IMPROVING THE HOLDOUT OF PRINT INKS, VARNISHES AND COATING MEASURES ON FABRIC MATERIALS OF FIBERS, AND MEASURES FOR IMPLEMENTING THE METHOD AND AREA PRODUCED BY IT
JP2770409B2 (en) * 1989-04-28 1998-07-02 ソニー株式会社 Display composition, coloring pigment and recording material
US5179065A (en) * 1989-04-28 1993-01-12 Sony Corporation Recording material with a display composition including a coloring pigment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2192954A (en) * 1936-07-22 1940-03-12 Du Pont Transfer of pigment to organic vehicles
US2343093A (en) * 1940-08-03 1944-02-29 Du Pont Treatment of textiles and composition useful therefor
US2646367A (en) * 1951-06-28 1953-07-21 Ncr Co Transfer paper
US2695245A (en) * 1950-01-18 1954-11-23 Ncr Co Process of recording by decoloring

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2192954A (en) * 1936-07-22 1940-03-12 Du Pont Transfer of pigment to organic vehicles
US2343093A (en) * 1940-08-03 1944-02-29 Du Pont Treatment of textiles and composition useful therefor
US2695245A (en) * 1950-01-18 1954-11-23 Ncr Co Process of recording by decoloring
US2646367A (en) * 1951-06-28 1953-07-21 Ncr Co Transfer paper

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976062A (en) * 1958-01-07 1961-03-21 Brechner Hyman Apparatus for payroll system
US3058758A (en) * 1959-08-12 1962-10-16 Edward A Govatsos Checkbook
US3900218A (en) * 1972-08-30 1975-08-19 Fuji Photo Film Co Ltd Desensitizer composition
US4012538A (en) * 1972-12-18 1977-03-15 Fuji Photo Film Co., Ltd. Method of forming color images employing desensitizing agents
US3952117A (en) * 1973-08-08 1976-04-20 Fuji Photo Film Co., Ltd. Method of desensitizing
US4039207A (en) * 1973-12-07 1977-08-02 Fuji Photo Film Co., Ltd. Recording sheet
US4021059A (en) * 1974-04-25 1977-05-03 Ciba-Geigy Corporation Production of images
US4023830A (en) * 1974-04-25 1977-05-17 Ciba-Geigy Corporation Production of images
DE2445669A1 (en) * 1974-09-25 1976-04-01 Pelikan Werke Wagner Guenther Correcting fluid for colour reaction papers - comprises aq soln of quaternary ammonium cpd and/or amine
US4078493A (en) * 1974-11-26 1978-03-14 Fuji Photo Film Co., Ltd. Desensitizing using dry reverse lithographic plate
US4172727A (en) * 1975-02-17 1979-10-30 Fuji Photo Film Co., Ltd. Desensitizer compositions
US4125636A (en) * 1975-07-07 1978-11-14 Fuji Photo Film Co., Ltd. Desensitizing composition and desensitizing method
DE2634789A1 (en) * 1975-08-28 1977-03-10 Mead Corp Aqueous slurry, the process for its production and its use for the production of pressure-sensitive writing surfaces
US4199618A (en) * 1975-09-02 1980-04-22 Champion International Corporation Hidden entry system
US4411700A (en) * 1980-10-17 1983-10-25 Fuji Photo Film Co., Ltd. Desensitizer compositions
DE3123509A1 (en) * 1981-06-13 1983-01-13 Geha-Werke Gmbh, 3000 Hannover Aqueous correction fluid for inks
DE3244801A1 (en) * 1981-12-04 1983-06-16 The Wiggins Teape Group Ltd., Basing View, Basingstoke, Hampshire RECORDING MATERIAL
US4725315A (en) * 1985-05-31 1988-02-16 Fuji Photo Film Co., Ltd. Desensitizer composition for color developer sheet in pressure sensitive recording system contains a piperidine derivative
US4840927A (en) * 1985-09-09 1989-06-20 Fuji Photo Film Co., Ltd. Desensitizer composition
US4927971A (en) * 1988-05-11 1990-05-22 Mitsubishi Paper Mills Ltd. Desensitizer composition
US5880062A (en) * 1993-06-16 1999-03-09 Xerox Corporation Ink jet printing process for desensitizing carbonless paper
US20050053748A1 (en) * 2003-09-05 2005-03-10 Gore Makarand P. Metal salt activators for use in leuco dye compositions
US6890614B2 (en) 2003-09-05 2005-05-10 Hewlett-Packard Development Company, L.P. Metal salt activators for use in leuco dye compositions
US9092999B1 (en) * 2007-07-27 2015-07-28 David Harruff Container identification device

Also Published As

Publication number Publication date
NL201815A (en)
DE1022606B (en) 1958-01-16
BE542642A (en)
NL105550C (en)
GB773180A (en) 1957-04-24
FR1136491A (en) 1957-05-23

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