EP0372585A2 - Matériau d'enregistrement pour le transfert thermique - Google Patents

Matériau d'enregistrement pour le transfert thermique Download PDF

Info

Publication number
EP0372585A2
EP0372585A2 EP89122716A EP89122716A EP0372585A2 EP 0372585 A2 EP0372585 A2 EP 0372585A2 EP 89122716 A EP89122716 A EP 89122716A EP 89122716 A EP89122716 A EP 89122716A EP 0372585 A2 EP0372585 A2 EP 0372585A2
Authority
EP
European Patent Office
Prior art keywords
thermal transfer
recording medium
ink layer
substrate
transfer recording
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.)
Withdrawn
Application number
EP89122716A
Other languages
German (de)
English (en)
Other versions
EP0372585A3 (fr
Inventor
Makoto C/O Seiko Epson Corporation Taniguchi
Michinari C/O Seiko Epson Corporation Tsukahara
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson 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 claimed from JP63311278A external-priority patent/JPH02155794A/ja
Priority claimed from JP63324897A external-priority patent/JPH02169296A/ja
Priority claimed from JP63324898A external-priority patent/JPH02169297A/ja
Priority claimed from JP1036618A external-priority patent/JPH02215597A/ja
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Publication of EP0372585A2 publication Critical patent/EP0372585A2/fr
Publication of EP0372585A3 publication Critical patent/EP0372585A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/38278—Contact thermal transfer or sublimation processes using ink-containing structures, e.g. porous or microporous layers, alveoles or cellules

Definitions

  • the present invention relates to a thermal transfer recording medium for use with a thermal transfer printer.
  • Prior art transfer recording media have a uniform thickness of ink layer coated on the entire surface of the transfer area except for pinholes and other defects that might occur accidentally. This prior art technique, however, has experienced several problems during thermal transfer, such as low resolution of tone reproduction and jumps from medium to high density.
  • a binder that melts in the same temperature range is selected and colorants such as a pigment and a dye are dispersed in the binder to formulate a heat-fusible ink, which is coated in uniform thickness over a substrate.
  • colorants such as a pigment and a dye are dispersed in the binder to formulate a heat-fusible ink, which is coated in uniform thickness over a substrate.
  • the heat-fusible ink is coated as interspersed dots to prevent ink spreading or chaining as described in Japanese Patent Application No. 59-224389.
  • An object, therefore, of the present invention is to provide a thermal transfer recording medium that is capable of achieving faithful tone reproduction upon thermal transfer.
  • the present invention provides a thermal transfer recording medium that has sufficiently improved tone reproduction characteristics of ink to enable the formation of a sharp color image with a broad range of reproduced colors when multi-colored surfaces are successively transferred.
  • a thermal transfer recording medium that has a thermal transfer ink layer coated on a substrate in such a way that the coated area is composed of randomly spaced small coated and uncoated regions.
  • a thermal transfer recording medium that has a thermal transfer ink layer coated on a substrate in such a way that said ink layer has randomly spaced small asperities across its thickness, with the thickness of any area having a recess being preferably no more than one half the thickness of any area having a projection. More preferably, any area having a recess is not thicker than 5 ⁇ m.
  • a thermal transfer recording medium that has a thermal transfer ink layer coated on a substrate in such a way that the coated area is composed of randomly spaced small coated and uncoated regions, and that said ink layer has randomly spaced small asperities across its thickness, with the thickness of any area having a recess being preferably no more than one half the thickness of any area having a projection, and with any area having a recess being not thicker than 5 ⁇ m in a more preferred embodiment.
  • the thermal transfer recording medium of the present invention is characterized by a thermal transfer ink layer which is coated in the form of isolation interspersed on a substrate. Desirably, the coated ink layer assumes 40 - 95% of the total area of the substrate.
  • the thermal transfer recording medium of the present invention which has the construction described above has the advantage of achieving faithful tone reproduction upon thermal transfer.
  • a particular advantage of this recording medium achieves faithful tone reproduction in the medium to high density regions upon thermal transfer.
  • the ink is not transferred all at once at a certain temperature but is transferred gradually over a broad temperature range. Further, the ink layer is coated as interspersed islands on a substrate. Because of these two major features, ink chaining, running and spreading are effectively prevented to insure good tone reproduction characteristics in the low to high density regions, thereby producing a sharp image with a broad range of reproduced colors.
  • Fig. 1A shows the surface state of a heat-fusible ink layer 101 coated on a substrate 102.
  • the encircled portion of Fig. 1A is shown enlarged in Fig. 1B, in which numeral 111 denotes the area where the heat-­fusible ink layer is deposited and numeral 113 denotes the area where it is not deposited.
  • numeral 112 denotes the enlarged portion of the substrate 102, which may be made of any substrate material for thermal transfer recording media such as polyethylene terephthalate, polyamide, polyimide, polyether sulfone, capacitor paper, etc.
  • the composition of the heat-fusible ink used in the first embodiment is shown in the following Table 1.
  • Table 1 Component Parts by weight Phthalocyanine Blue 20 Carnauba wax No. 1 20 Paraffin wax 15 Oxidized polyethylene wax 20 Polystyrene resin 25 Toluene 450 Methyl ethyl ketone 450
  • Fig. 2 is a graph showing the tone reproduction characteristic of the recording medium of the present invention (a) and that of a prior art product (b). Comparing curves (a) and (b), one can see that the recording medium of the present invention shows a very gradual change in density. In other words, transfer density can be easily controlled by changing transfer energy, thus leading to the production of high-quality prints with improved tone reproduction.
  • the vertical axis of the graph in Fig. 2 plots reflection optical density (OD) with maximum value normalized for 1.0, and the horizontal axis plots transfer energy.
  • Fig. 3A shows schematically a heat-fusible ink layer 101 coated on a substrate 102.
  • the encircled portion of Fig. 3A is shown enlarged in Fig. 3B.
  • the hatched area 111 is a projection of the heat-fusible ink
  • 113′ denotes a recess in the heat-fusible ink layer.
  • Numeral 112 denotes the enlarged portion of the substrate 102, which may be made of any substrate material for thermal transfer recording media such as polyethylene terephthalate, polyamide, polyimide, polyether sulfone, capacitor paper, etc.
  • the thickness of the ink coating is not limited to any particular value but preferably, the thickness of the recessed ink layer 113 is no more than one half the thickness of the projecting portion 111 or is no greater than 5 ⁇ m.
  • the composition of the heat-fusible ink used in the second embodiment is shown in the following Table 2.
  • the present invention which relates to the structure of a thermal transfer recording medium is by no means limited to the ink composition shown in Table 2.
  • Fig. 4 is a graph showing the tone reproduction characteristic of the recording medium of the present invention (301) and that of a prior art product (302).
  • the vertical axis of the graph in Fig. 4 plots reflection OD with maximum value normalized for 1.0 and the horizontal axis plots transfer energy. Comparing curves (301) and (302), one can see that the recording medium of the present invention shows a very gradual change in density in the medium to high density regions where transfer energy varies from 24 to 28 mJ/mm2.
  • Fig. 5A shows schematically a heat-fusible ink layer 101 coated on a substrate 102.
  • the encircled portion of Fig. 5A is shown enlarged in Fig. 5B.
  • the hatched area 111 is a projection of the heat-fusible ink, and 113 denotes a recess in the heat-fusible ink layer.
  • Numeral 114 denotes the area where the heat-fusible ink layer is not deposited.
  • Numeral 112 denotes the enlarged portion of the substrate 102, which may be made of any substrate material for thermal transfer recording media such as polyethylene terephthalate, aromatic polyamide, aliphatic polyamide, polyimide, polyether sulfone, capacitor paper, etc.
  • the thickness of the ink coating is not limited to any particular value but preferably, the thickness of the recessed ink layer is no more than one half the thickness of the projecting portion or is no greater than 5 ⁇ m.
  • the composition of the heat-fusible ink used in the third embodiment is shown in the following Table 3.
  • the present invention which relates to the structure of a thermal recording medium is by no means limited to the ink composition shown in Table 3.
  • Fig. 6 is a graph showing the tone reproduction characteristic of the recording medium of the present invention (301) and that of a prior art product (302).
  • the vertical axis of the graph in Fig. 6 plots reflection OD with maximum value normalized for 1.0 and the horizontal axis plots transfer energy. Comparing curves (301) and (302), one can see that the recording medium of the present invention shows a very gradual change in density in the medium to high density regions where transfer energy varies from 25 to 29 mJ/mm2.
  • FIG. 7A The surface stage of a heat-fusible ink layer coated by the prior art method is illustrated as a comparison in Figs. 7A and 7B.
  • the heat-fusible ink layer indicated by 201 is coated on a substrate 202.
  • the essential part of Fig. 7A is shown enlarged in Fig. 7B, in which 211 denotes the enlarged portion of 201 and 212 denotes the enlarged portion of 202.
  • the difference in the coating thickness of heat-fusible ink layer as deliberately created between 111 and 113 according to the present invention is not observed in Figs. 7A and 7B. Nor is observed the small region as indicated by 114 where the heat-fusible ink is not deposited in the ink coated area.
  • Figs. 8A and 8B show a model case where a prior art heat-fusible ink layer 404 melts by heat generation from heating elements 407 in a thermal head 406.
  • the areas where the ink melts are delineated by ABCD and EFGH.
  • the substrate is shown by 403 and the ink which is transferred onto receiving sheet as a result of heat generation is shown by 405.
  • Figs. 9A, 9B and 9C show the process of forming asperities in an ink layer according to the present invention. They show a model case where a heat-fusible ink layer 504 melts by heat generation from heating elements 507 in a thermal head 506. The areas where the ink melts are delineated by A′B′C′D′ and E′F′G′H′. The substrate is shown by 503 and the ink which is transferred onto receiving sheet as a result of heat generating is shown by 505.
  • the region where no ink layer is deposited offers the advantage of reducing force 502 which resists ink withdrawal to zero.
  • the relation 502 ⁇ 501 always holds to provide a thermal transfer recording medium that also achieves faithful tone reproduction, with reduced jumps from medium to high density.
  • Tables 4 - 7 show the thermal transfer ink compositions for three colors, yellow, magenta and cyan, used in Examples 1 - 4 of the present invention.
  • the figures in these tables show the amounts of respective ingredients in parts by weight.
  • the ink compositions shown in Tables 4 - 7 contained both high-­molecular weight polymers that would not exhibit a distinct melting phenomenon and a plurality of waxes having different melting points (hereinafter abbreviated as m.p.). So, taken as a whole, these ink compositions did not show a distinct melting phenomenon at certain specified temperatures.
  • the thermal transfer inks were prepared by the following procedure. First, polymers and waxes were added to solvent capable of dissolution or uniform dispersion of these components and then mixed with stirring. Subsequently, colorants were added and dispersed in a ball mill for 18 h until uniform dispersion of the binders and colorants was confirmed.
  • Thermal transfer inks suitable for use in the present invention can be prepared not only by the solvent process described above but also by other methods such as hot melt and emulsion processes.
  • Table 5 (Example 2) Component Y M C Hansa Yellow G 10 Brilliant Carmine 6B 10 Phthalocyanine Blue 10 Polyester Polystyrene 20 20 20 EVA EEA 5 5 5 Carnauba wax 30 30 30 Paraffin wax 20 20 20 Polyethylene wax 15 15 15 Total 100 100 100 100 Table 6 (Example 3) Component Y M C Hansa Yellow G 10 Brilliant Carmine 6B 10 Phthalocyanine Blue 10 Polyester 20 20 20 20 Polystyrene EVA 15 15 15 EEA Candelilla wax 20 20 20 20 Paraffin wax 20 20 20 Saxol wax 15 15 15 Total 100 100 100 Table 7 (Example 4) Component Y M C Hansa Yellow G 10 Brilliant Carmine 6B 10 Phthalocyanine Blue 10 Polyester 15 15 15 15 Polystyrene 10 10 EVA 5 5 5 Microcrystalline wax 15 15 15 Carnauba wax
  • thermal transfer recording media were prepared by the following procedure.
  • the solvent-dispersed inks prepared by the solvent method described above were coated onto a 6- ⁇ m thick substrate 5 as shown in Fig. 10.
  • the substrate was made of PET (polyethylene terephthalate).
  • the solvent in the inks was removed by thermal or vacuum drying so as to form a thermal transfer recording medium having a heat-fusible ink layer 1 (0.5 - 5 ⁇ m) on the substrate 5.
  • toluene was used as a solvent but this is not the sole solvent that can be used in the present invention and depending upon the components of ink, organic solvents such as methyl ethyl ketone, tetrahydrofuran, acetone, methyl isobutyl ketone, cyclohexanone, butyl acetate, ethyl acetate, ethanol, methanol and carbon tetrachloride may be used either independently or as admixtures with themselves or water.
  • organic solvents such as methyl ethyl ketone, tetrahydrofuran, acetone, methyl isobutyl ketone, cyclohexanone, butyl acetate, ethyl acetate, ethanol, methanol and carbon tetrachloride may be used either independently or as admixtures with themselves or water.
  • acrylic resins may be used in thermal transfer inks.
  • polyurethane polyvinyl acetal, polyamides, nylon, rosin resins, polyethylene, polycarbonates, vinylidene chloride resins, polyvinyl alcohol, cellulosic resins epoxy resins, vinyl acetate resin, vinyl chloride resin, etc.
  • thermal transfer inks acrylic resins, polyurethane, polyvinyl acetal, polyamides, nylon, rosin resins, polyethylene, polycarbonates, vinylidene chloride resins, polyvinyl alcohol, cellulosic resins epoxy resins, vinyl acetate resin, vinyl chloride resin, etc.
  • montan wax Besides the waxes shown in Tables 4 - 7, montan wax, synthetic oxidized waxes, ⁇ -olefin/maleic anhydride copolymers, animal and vegetable waxes, lanolin, etc. may be used in the present invention.
  • inorganic pigments, dyes, carbon black, etc. may be used as colorants in the present invention.
  • Fig. 11 shows schematically the constitution of the thermal transfer recording media prepared using the ink compositions of Examples 1 - 4 of the present invention, together with the ink coverages of the substrate surface.
  • thermal transfer medium 2 contains ink layer 1 and substrate 5.
  • Fig. 12 shows schematically the constitution of a thermal transfer recording medium prepared according to Comparative Example 1 using the ink compositions of Example. As shown, the ink compositions were applied to the substrate to give an area coverage of about 100%.
  • Fig. 13 shows schematically the constitution of a thermal transfer recording medium prepared according to Comparative Example 2 using the ink compositions of Example 1. As shown, the ink compositions were applied to the substrate to give an area coverage of about 30%.
  • thermal transfer inks Using the thermal transfer inks described above, a printing test was conducted by three-color overprinting with a thermal head.
  • the mechanism of printing with a thermal head using these thermal transfer inks is shown schematically in Fig. 15.
  • the thermal transfer recording medium prepared by the method described above makes contact with a heating element 8 in the thermal head 7 at the surface which is not coated with the ink layer 1.
  • the surface of the medium which is coated with the ink layer makes contact with a receiving sheet 4 on the drum 9.
  • the heating element 8 When the heating element 8 generates heat according to print information, its thermal energy is transmitted to the ink layer 1 through the substrate 5, whereupon the heated portions of the ink layer soften and are transferred as patterned dots 6 onto the receiving sheet 4 to form an image.
  • the patterned image to be printed on the receiving sheet consisted of horizontal stripes having a density graduation of 16 scales.
  • the printing energy was adjusted to such a constant value that a full density would be attained at scale 14 when ink of the first color was transferred, with excess energy being applied at scales 15 and 16.
  • the transfer density at each scale was measured in terms of reflection OD values using a Macbeth densitometer Model TR-9-­27 (Kollmorgan Corp.) equipped with filters for complementary colors.
  • Fig. 15 shows the tone reproduction of magenta which was the first color of the inks prepared in Examples 1 - 4.
  • Fig. 16 shows the tone reproduction of cyan which was the second color of the inks prepared in Examples 1 - 4.
  • Fig. 17 shows the tone reproduction of yellow which was the third color of the inks prepared in Examples 1 - 4.
  • Fig. 18 shows the tone reproduction of magenta which was the first color of the inks prepared in Comparative Examples 1 - 2.
  • Fig. 19 shows the tone reproduction of cyan which was the second color of the inks prepared in Comparative Examples 1 - 2.
  • Fig. 20 shows the tone reproduction of yellow which was the third color of the inks prepared in Comparative Examples 1 - 2.
  • the thermal transfer inks of Examples 1 - 4 exhibited good tone reproduction over a broad range of transfer energies without the occurrence of ink running even in the high density region where high printing energy was applied.
  • the inks of Comparative Examples 1 was poorly transferred in the low density region. In addition, they experienced a sudden increase from medium to high density. Further, the ink of Comparative Example 1 not only caused scumming over the entire printing surface but also experienced running in the high density region. The ink of Comparative Example 2 was transferred in such a small amount that satisfactory density could not be achieved.
  • thermal transfer recording medium of the present invention is also useful with four-color (including black) printers, as well as monochromatic and two-color printers.
  • a thermal transfer recording medium that has a heat-fusible ink layer coated on a substrate in such a way that the coated area is composed of randomly spaced small coated and uncoated regions.
  • This recording medium has the advantage of providing good tone reproduction.
  • a thermal transfer recording medium that has a heat-fusible ink layer coated on a substrate in such a way that said ink layer has randomly spaced small asperities across its thickness, with the thickness of any area having a recess being preferably no more than one half the thickness of any area having a projection. More preferably, any area having a recess is not thicker than 5 ⁇ m.
  • This thermal transfer recording medium has the particular advantage of providing good tone reproduction in the medium to high density regions upon thermal transfer.
  • a thermal transfer recording medium that has a heat-fusible ink layer coated on a substrate in such a way that the coated area is composed of randomly spaced small coated and uncoated regions, and that said ink layer has randomly spaced small asperities across its thickness, with the thickness of any area having a recess being preferably no more than one half the thickness of any area having a projection, with any area having a recess being not thicker than 5 ⁇ m in a more preferred embodiment.
  • This thermal transfer recording medium also has the particular advantage of providing good tone reproduction in the medium to high density regions upon thermal transfer.
  • the thermal transfer recording medium of the present invention offers the advantage of forming a full-color image and other prints that are sharp and which achieve good reproduction of a wide range of colors in all density regions.
EP19890122716 1988-12-09 1989-12-08 Matériau d'enregistrement pour le transfert thermique Withdrawn EP0372585A3 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP63311278A JPH02155794A (ja) 1988-12-09 1988-12-09 熱転写記録媒体
JP311278/88 1988-12-09
JP324898/88 1988-12-23
JP63324897A JPH02169296A (ja) 1988-12-23 1988-12-23 熱転写記録媒体
JP63324898A JPH02169297A (ja) 1988-12-23 1988-12-23 熱転写記録媒体
JP324897/88 1988-12-23
JP36618/89 1989-02-16
JP1036618A JPH02215597A (ja) 1989-02-16 1989-02-16 熱転写用インクフイルム

Publications (2)

Publication Number Publication Date
EP0372585A2 true EP0372585A2 (fr) 1990-06-13
EP0372585A3 EP0372585A3 (fr) 1991-04-10

Family

ID=27460290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890122716 Withdrawn EP0372585A3 (fr) 1988-12-09 1989-12-08 Matériau d'enregistrement pour le transfert thermique

Country Status (1)

Country Link
EP (1) EP0372585A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8647740B2 (en) * 2002-12-02 2014-02-11 Avery Dennison Corporation Heat-transfer label well-suited for labeling fabrics and methods of making and using the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935362A (en) * 1973-10-25 1976-01-27 Bell & Howell Company Image control means and structured transfer sheet for thermal reproduction processes
JPS59224389A (ja) * 1983-06-04 1984-12-17 Canon Inc 感熱転写材
JPS63268693A (ja) * 1987-04-27 1988-11-07 Fuji Kagakushi Kogyo Co Ltd 多数回使用型熱転写記録媒体
JPS6416684A (en) * 1987-07-10 1989-01-20 Fuji Kagaku Shikogyo Repeatedly usable type thermal transfer recording medium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935362A (en) * 1973-10-25 1976-01-27 Bell & Howell Company Image control means and structured transfer sheet for thermal reproduction processes
JPS59224389A (ja) * 1983-06-04 1984-12-17 Canon Inc 感熱転写材
JPS63268693A (ja) * 1987-04-27 1988-11-07 Fuji Kagakushi Kogyo Co Ltd 多数回使用型熱転写記録媒体
JPS6416684A (en) * 1987-07-10 1989-01-20 Fuji Kagaku Shikogyo Repeatedly usable type thermal transfer recording medium

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 13, no. 193 (M-822)(3541) 09 May 1989; & JP-A-01 016 684 (FUJI KAGAKUSHI KOGYO COMPANY LIMITED) 20 January 1989, *
PATENT ABSTRACTS OF JAPAN, vol. 13, no. 67 (M-798)(3415) 15 February 1989; & JP-A-63 268 693 (FUJI KAGAKUSHI KOGYO COMPANY LIMITED) 07 November 1988, *
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 100 (M-376)(1823) 02 May 1985; & JP-A-59 224 389 (CANON K.K.) 17 December 1984, *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8647740B2 (en) * 2002-12-02 2014-02-11 Avery Dennison Corporation Heat-transfer label well-suited for labeling fabrics and methods of making and using the same
US9499937B2 (en) 2002-12-02 2016-11-22 Avery Dennison Corporation Heat-transfer label well-suited for labeling fabrics and methods of making and using the same
US10596789B2 (en) 2002-12-02 2020-03-24 Avery Dennison Corporation Method for labeling fabrics and heat-transfer label well-suited for use in said method

Also Published As

Publication number Publication date
EP0372585A3 (fr) 1991-04-10

Similar Documents

Publication Publication Date Title
CA1198591A (fr) Support de reproduction multichrome par voie thermique
EP0342713A1 (fr) Matériel et procédé pour le transfert thermique
EP0198505B1 (fr) Feuille pour le transfert thermosensible
US4871609A (en) Multicolor thermosensitive image transfer sheet
EP0698504A1 (fr) Matériau pour l'enregistrement par transfert thermique pour former des images en couleurs
EP0673789B1 (fr) Matériau pour l'enregistrement par transfert thermique
EP0372585A2 (fr) Matériau d'enregistrement pour le transfert thermique
US5175055A (en) Thermal transfer ink and transfer medium
US6633320B2 (en) Multi-gradation recording method and thermal transfer recording medium used in the method
JPH11208130A (ja) 感熱転写記録媒体
US5198061A (en) Multicolor thermosensitive image transfer sheet and recording method using the same
JPS6052391A (ja) 多色型熱転写記録紙
US4615932A (en) Multi-gradation heat sensitive transfer medium
EP0158686A1 (fr) Matériel pour transfert par la chaleur à gradation multiple
CA2231279C (fr) Support d'enregistrement pour transfert thermique
GB2273992A (en) Thermal transfer sheet
CA1236300A (fr) Decalcomanie thermosensible a tons gradues
JPH02199181A (ja) 熱転写用インク
JPS61225090A (ja) 感熱転写リボン
JPS62181185A (ja) 感熱転写材および感熱転写記録方法
JPH02215597A (ja) 熱転写用インクフイルム
JPH02202562A (ja) 熱転写用インク
JPH0377795B2 (fr)
JPS59120493A (ja) 熱転写シ−ト
JPH03151271A (ja) 熱転写記録媒体

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19911009

17Q First examination report despatched

Effective date: 19931108

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19940308