Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/124—Duplicating 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
  • B41M5/132—Chemical colour-forming components; Additives or binders therefor
  • B41M5/155—Colour-developing components, e.g. acidic compounds; Additives or binders therefor; Layers containing such colour-developing components, additives or binders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
  • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
  • B41M5/333—Colour developing components therefor, e.g. acidic compounds
  • B41M5/3333—Non-macromolecular compounds

Definitions

• the present invention relates to new thermographic recording compositions, as well as the thermographic recording media obtained from these compositions.
• saccharin is used in another form and in the presence of dyes to react with these.
• Bactericidal and fungicidal agent this is the case for certain derivatives of appropriately substituted saccharin.
• thermoreactive compositions an entirely different family of compounds could be used as a developer in combination - with conventional dye precursors.
• salts are obtained by direct reaction of the saccharin derivative with a suitable metal salt, thus, for example, the salts of the following metals: Cu, Cd, Co, Fe (II), Ni, Mn, Zn.
• All these different constituents are ground, emulsified or dissolved in the medium and coated in one or more layers on a paper or other support (plastic for example).
• a paper or other support plastic for example
• the color generator and the color developer are ground separately, so as to avoid any premature reaction. Both dispersions being mixed before coating in the case of a coating in one layer.
• the nature, the grammage of the support, as well as the number and the thickness of the layers and their method of coating depend on the intended use, as well as on the desired effect, and are easily determined by a person skilled in the art. .
• compositions are ground separately: which is coated at a rate of 6.5 g / m 2 sec on a paper of 50 g / m 2 . After drying and calendering, the paper is used on a XEROX 485 fax machine. We obtain a good quality of restitution of the original, with black densities from 0.90 to 1.00. These densities are measured by reflection with a GAM RD 144 densitometer (WRATTEN filter No. 106).
• compositions are ground separately:
• the following mixture is prepared: which is coated at a rate of approximately 6.5 g / m 2 sec on a paper of 55 g / m 2 . After drying and calendering, this paper is used on an office calculating machine with thermal printer OLIVETTI LOGOS n ° 7.
• the blue trace has a density of 1.0 (densitometer GAM RD 144, WRATTEN filter n ° 106).
• the paper reaction threshold is very marked and is around 85 ° C.
• composition is ground in a homogeneous manner:
• this paper After drying and possibly calendering, this paper is used in an apparatus for recording EKGs of the "cardiopan 571" type from PHILIPS and makes it possible to obtain a very finely resolved black line, whatever the speed of movement of the paper 50, 25 or 10 mm / s.
• the density of the trace is 1.15 (GAM RD 144 densitometer, WRATTEN filter No. 106).
• composition is ground in a homogeneous manner:
• This layer is deposited at a rate of 4 g / m 2 on a Terphane polyester support from RHONE POULENC 100 ⁇ m thick. After drying, the following composition is deposited above, at a rate of approximately 3 g / m 2 sec:
• thermoreactive film After drying and possibly calendering, this thermoreactive film is tested on a "Thermotest" device from the company SETARAM (LYON). We obtain red traces of density 1.4 (GAM RD 144 densitometer, green WRATTEN filter n ° 581). The reaction threshold for this paper is well marked and is around 85 ° C.
• composition is dispersed in a homogeneous manner, after having ground the color-former and the saccharin separately, the other constituents being distributed equitably between the two grindings:
• This layer is deposited on a paper of 50 g / m at a rate of 6.5 g / m 1 . After drying and calendering, this paper is used on an ANDERSON-JACOBSON AJ 630 thermal printer (10 characters per inch and 6 lines per inch) and allows us to obtain blue records with a density of 1.0 to 0.85 , depending on the speed selected: 10, 15 or 30 characters per second (GAM RD 144 densitometer, WRATTEN filter n ° 106).
• the reaction threshold is very marked and is around 95 ° C.
• composition is ground in a homogeneous manner:
• This composition is deposited at a rate of 4 g / m 2 sec on a 55 g / m 2 paper support. Then, after drying, the following composition is deposited on top, at a rate of approximately 3 g / m 2 sec.
• this paper After drying and calendering, this paper is used in a device for recording electrocardiograms of the "Cardiopan 571" type from PHILIPS and makes it possible to obtain a dark brown trace very finely resolved, whatever the speed of the paper: 50, 25 or 10 mm / s.
• the density of the trace is 0.90 (densitometer GAM RD 144, WRATTEN filter n ° 106).
• compositions are ground separately:
• the following mixture is prepared: which is coated, at a rate of approximately 6.5 g / m 2 sec, on a 50 g / m paper. After drying and calendering, this paper is used on a HEWLETT-PACKARD 97 desktop calculator with thermal printer.
• the slightly reddish black trace has a density of 1.15 (GAM RD 144 densitometer, WRATTEN filter No. 106).
• compositions have good light and storage stability under ambient temperature and humidity conditions, as well as under more severe conditions, at high humidity for example.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Heat Sensitive Colour Forming Recording (AREA)
• Color Printing (AREA)
• Thiazole And Isothizaole Compounds (AREA)
• Compositions Of Macromolecular Compounds (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=9276226

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (11)

Citations (3)

Family Cites Families (12)

• 1982
  • 1982-07-16 FR FR8212845A patent/FR2530191B1/fr not_active Expired
• 1983
  • 1983-07-13 EP EP83420117A patent/EP0106772B1/de not_active Expired
  • 1983-07-13 US US06/513,304 patent/US4536219A/en not_active Expired - Lifetime
  • 1983-07-13 DE DE8383420117T patent/DE3370460D1/de not_active Expired
  • 1983-07-15 JP JP58128040A patent/JPS5933189A/ja active Granted

Patent Citations (3)

Non-Patent Citations (2)

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