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
  • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
  • B41M5/42—Intermediate, backcoat, or covering layers
  • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
• • 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
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/52—Macromolecular coatings
  • B41M5/5236—Macromolecular coatings characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose
• • 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
  • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
  • B41M5/42—Intermediate, backcoat, or covering layers
• • 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
  • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
  • B41M5/42—Intermediate, backcoat, or covering layers
  • B41M5/423—Intermediate, backcoat, or covering layers characterised by non-macromolecular compounds, e.g. waxes
• • 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
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
• • 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
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
  • B41M5/506—Intermediate layers
• • 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
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/52—Macromolecular coatings
• • 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
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/52—Macromolecular coatings
  • B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
  • B41M2205/02—Dye diffusion thermal transfer printing (D2T2)
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
  • B41M2205/32—Thermal receivers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
  • B41M2205/36—Backcoats; Back layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
  • B41M2205/38—Intermediate layers; Layers between substrate and imaging layer

Definitions

• the invention relates to a recording material for the production of images in photo quality with thermal printing processes, in particular with a dye transfer process.
• the method of thermal dye transfer is used to reproduce a digitally generated image in the form of a printed image whose image quality is adapted to the level of silver salt photography.
• the digital image is selectively processed with respect to the primary colors cyan, magenta, yellow and black and converted into corresponding electrical signals, which are then converted into heat by means of the thermal head of a printer.
• the dye sublimates from the donor layer of an ink ribbon (ink sheet) in contact with the recording material to be printed, and diffuses into the receiving layer of the recording material.
• a recording material In order to obtain images of photo quality, a recording material needs good surface properties, low heat conductivity, good heat resistance, so-called compressibility (softness), which is important for ensuring good contact between the thermal head of the printer and the recording material, and good dimensional stability. Moreover, after printing, the recording material must have a good storage stability in order to prevent the migration of the dyes over time into and through the support and thus the deterioration of the image quality.
• Recording materials for thermal transfer printing have been widely described. They essentially comprise a carrier, a dye-receiving layer and optionally further functional layers. By appropriate selection of the components of the recording material, the requirements placed on the material can be optimized.
• Uncoated or coated papers can be used as the support, with synthetic resin-coated papers coated in particular with polyolefin or papers provided with a multilayer plastic film being considered particularly suitable. These carriers are for example described in EP 0 671 281 A1 . EP 0 681 922 A1 or EP 0 812 699 A1 ,
• the dye-receiving layer contains a resin that has an affinity for the dye from the donor material.
• a resin that has an affinity for the dye from the donor material.
• plastics with ester compounds such as polyester resins, polyacrylic ester resins, polycarbonate resins, polyvinyl acetate resins, styrene acrylate resins
• plastics with amide compounds such as polyamide resins
• polyvinyl chloride and mixtures of the resins mentioned can be used.
• copolymers which contain as main constituent at least one of the abovementioned polymers, e.g. Vinyl chloride / vinyl acetate copolymer.
• anticurl layers can be used to counteract the curvature of the recording material after passing through the thermal printer.
• plastic films which are laminated on the back side of the recording material are well suited for this purpose.
• the problem of compressibility can be solved by applying an interlayer serving as a cushioning layer, as in FIG JP 02-274592 or JP 03-268998 described, be solved.
• an interlayer serving as a cushioning layer as in FIG JP 02-274592 or JP 03-268998 described, be solved.
• the in JP 04-21488 be described, containing an intermediate layer containing hollow microspheres.
• This intermediate layer In addition, it has an insulating effect and helps to reduce the thermal conductivity.
• a thermal imaging recording medium which has good temperature resistance and low thermal conductivity as well as good compressibility.
• This object is achieved by means of a layer which consists of a gelatin derivatized with ethylenically unsaturated monomers, in particular a (meth) acrylated gelatin.
• a disadvantage of this recording material is the high application weight of this layer. Because in order to achieve the required low thermal conductivity, layer thicknesses of 20 to 100 microns are necessary. However, the problem of dye migration into the depth of the recording material is not yet solved. A reduction of the dye migration can therefore be achieved by curing the layer in an additional operation using a Glättzylinders.
• a recording material for thermal printing processes comprising a support and a dye-receiving layer equipped for thermal dye transfer, wherein a barrier layer is disposed between the support and the dye-receiving layer and the barrier layer contains gelatin and a water-dispersible polymeric binder, wherein gelatin and the water-dispersible polymeric binders are crosslinked together.
• the gelatin in the barrier layer is preferably a non-chemically modified or non-derivatized gelatin.
• a gelatin having an isoelectric point of 8 to 9, more preferably 8 to 8.5, can be used in the barrier layer.
• the water-dispersible polymeric binder in the barrier layer is preferably a water-dispersible polyester / polyurethane copolymer.
• a hydrophilic barrier is required.
• Such a barrier may be a hydrophilic binder coat.
• a disadvantage of such hydrophilic Binderstrichen is that the thermal printing in climates with high humidity, a so-called Mottle effect, i. a cloudiness in the printed image, occurs.
• Mottle effect is achieved if the barrier layer contains a binder mixture of gelatin and polyester / polyurethane copolymer. It is also surprising that the aforementioned Mottle effect is avoided by this binder mixture after crosslinking. Consequently, a barrier layer containing gelatin and polyester / polyurethane copolymer not only permits the printing of images with low or mottle-free structures, but also a good to very good migration behavior of the recording material.
• the mass ratio of gelatin to the water-dispersible polymeric binder in the barrier layer may be 80:20 to 40:60, more preferably 60:40 to 50:50.
• the polyester polyurethanes used according to the invention are aliphatic polyester polyurethanes. They can be based on an aliphatic isocyanate having a modulus of elasticity of 100% according to DIN 53504 of 10 to 14 MPa, preferably 12 to 13 MPa. You can, for example, a melting range of 190 to 230 ° C, preferably 200 up to 220 ° C, on the Koflerbank. Suitable polyester polyurethanes can be used in anionic form as a dispersion. The solids content of the dispersion may be from 20 to 45% by weight, preferably from 28 to 40% by weight.
• Films of the polyester polyurethane used according to the invention may have a microhardness according to DIN 53504 of about 95 ° Shore A.
• the tensile strength of original such films according to DIN 53504 may be about 40 MPa and the elongation at break original according to DIN 53504 may be about 400%.
• Such polyester polyurethanes are commercially available under the name NeoRez ® in different types.
• crosslinking agents which allow crosslinking of a protein with a polyester-polyurethane copolymer can be used for this purpose.
• Suitable crosslinking agents are, for example, imine groups or isocyanate group-containing compounds.
• the crosslinking of both binders can be achieved with a combination of at least two crosslinking agents.
• the first crosslinking agent may be an imine group-containing compound and the second crosslinking agent is preferably a compound having isocyanate groups.
• the mass ratio of the imine group-containing crosslinking agent to the isocyanate group-containing crosslinking agent may be, for example, 6: 1 to 1: 1.
• the amount of the crosslinking agent containing imine groups is 5 to 15% by weight, based on the total mass of the binders.
• the amount of the isocyanate group-containing crosslinking agent in the barrier layer may be from 2 to 15% by weight, based on the total amount of the binders.
• the total amount of crosslinking agent used according to the invention can be up to 40% by weight, based on the total mass of the binder.
• the imine group-containing crosslinking agent is preferably a polyaziridine.
• the isocyanate group-containing crosslinking agent is in particular a blocked isocyanate.
• the blocking of the isocyanate can be effected by an oxime, which is split off under the action of temperature.
• the gelatin becomes water-insoluble, and crosslinking of gelatin with the water-dispersible binder also takes place.
• the barrier layer according to the invention may contain a pigment.
• a pigment Particularly preferred are finely divided pigments which increase the opacity of the layer. Particularly suitable for this is titanium dioxide.
• the amount of pigment may preferably be up to 30 wt .-%, but in particular 5 to 25 wt .-%, based on the mass of the dried layer.
• the barrier layer according to the invention may optionally also contain other auxiliaries, for example anionic or nonionic surfactants, dyes, brighteners, lubricants, antiblocking agents and other conventional additives.
• auxiliaries for example anionic or nonionic surfactants, dyes, brighteners, lubricants, antiblocking agents and other conventional additives.
• the amount of auxiliaries may be from 0.01 to 5.0% by weight, in particular from 0.05 to 3.5% by weight, based on the weight of the dried layer.
• the binders dissolved or dispersed in water are mixed together in the first step.
• the pH can be adjusted to 7 to 7.5.
• the pigment dispersion is added and mixed.
• the addition of the crosslinking agent takes place. After a subsequent mixing process, the coating composition produced in this way is applied to the carrier material.
• two crosslinking agents are added to the dispersion described above, wherein the addition of the second crosslinking agent can be carried out simultaneously with the addition of the first crosslinking agent or at a time interval thereto.
• the coating composition for forming the barrier layer according to the invention can be applied in-line or off-line with all customary in papermaking application units, wherein the amount is chosen so that after drying the coating weight at most 3 g / m 2 , in particular 0.5 to 2.5 g / m 2 or according to a particularly preferred embodiment is 1 to 2 g / m 2 .
• the carrier used according to the invention may contain or consist of an uncoated or a coated base paper.
• base paper is understood as meaning an uncoated paper sized in the mass and / or a surface-sized paper.
• a base paper may include pulp fibers, sizing agents such as alkylketene dimers, fatty acids and / or fatty acid salts, epoxidized fatty acid amides, alkenyl or alkyl succinic anhydride, wet strength agents such as polyamine-polyamide-epichlorohydrin, dry strength agents such as anionic, cationic or amphoteric polyamides or cationic starches, optical brighteners, fillers, pigments , Dyes, defoamers and other known in the paper industry tools may contain.
• the base paper can be surface-sized.
• Suitable sizing agents are polyvinyl alcohol or oxidized starch.
• the base paper can be produced on a Fourdrinier or a Yankee paper machine (cylinder paper machine).
• the basis weight of the base paper may be 50 to 250 g / m 2 , in particular 80 to 180 g / m 2 .
• the raw paper can be used in uncompacted or compacted form (smoothed).
• Particularly suitable are base papers having a density of 0.8 to 1.2 g / cm 3 , in particular 0.90 to 1.1 g / cm 3 .
• pulp fibers for example, bleached hardwood kraft pulp (LBKP), bleached softwood kraft pulp (NBKP), bleached hardwood sulfite pulp (LBSP) or bleached softwood sulfite pulp (NBSP) can be used.
• Pulp fibers derived from paper wastes can also be used.
• the pulp fibers mentioned can also be used mixed and proportions of other fibers, for example of synthetic resin fibers, mixed.
• pulp fibers are used from 100% hardwood pulp.
• the mean fiber length of the unground pulp is preferably 0.5 to 0.85 mm (Kajaani measurement).
• fillers for example, kaolins, calcium carbonate in its natural forms such as limestone, marble or dolomite stone, precipitated calcium carbonate, calcium sulfate, barium sulfate, titanium dioxide, talc, silica, alumina and mixtures thereof can be used in the raw paper.
• kaolins calcium carbonate in its natural forms such as limestone, marble or dolomite stone, precipitated calcium carbonate, calcium sulfate, barium sulfate, titanium dioxide, talc, silica, alumina and mixtures thereof can be used in the raw paper.
• a pigment-containing layer can be arranged on the base paper.
• the pigment may be a metal oxide, silicate, carbonate, sulfide or sulfate.
• the base paper or the coated base paper can be provided on both sides with synthetic resin layers.
• the resin layers may preferably contain a thermoplastic polymer. Particularly suitable for this purpose are polyolefins, for example low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene, 4-methylpentene-1 and mixtures thereof and polyesters, for example polycarbonates.
• the front and / or rear synthetic resin layer contains at least 40 wt .-% HDPE having a density of more than 0.95 g / cm 3 , in particular 60 to 80 wt .-%.
• Particularly preferred is a composition consisting of 65% by weight HDPE having a density greater than 0.95 g / cm 3 and 35% by weight LDPE having a density of less than 0.935 g / cm 3 .
• the synthetic resin layers may contain white pigments such as titanium dioxide as well as other auxiliaries such as optical brighteners, dyes and dispersing aids.
• antistatic substances in particular electrically conductive inorganic pigments, are added to the synthetic resin layers.
• the coating weight of the synthetic resin layers may be 5 to 50 g / m 2 , in particular 5 to 30 g / m 2 , but preferably 10 to 20 g / m 2 .
• the synthetic resin layer can be extruded onto the raw paper or the coated base paper in one layer or coextruded in a multilayered manner.
• the extrusion coating can be carried out at machine speeds up to 600 m / min.
• the carrier comprises a uncoated or coated base paper provided with a plastic film, the plastic film being laminated on the side facing the barrier layer (front side).
• a polymeric layer preferably low density polyethylene (LDPE)
• LDPE low density polyethylene
• the thickness of the polyethylene layer is 6 to 15 g / m 2 , in particular 6 to 10 g / m 2 .
• the plastic film preferably has a multilayer structure with a porous core layer and at least one pore-free surface layer. Particularly suitable for this purpose is a biaxially oriented polypropylene film with a thickness of 30 to 60 ⁇ m, in particular 35 to 50 ⁇ m, and an opacity of 70 to 90%, measured according to JIS-P-8148.
• a single-layered or multi-layered plastic film in particular a biaxially oriented polypropylene film, can likewise be applied to the rear side.
• the layer used according to the invention preferably contains a polymer selected from the group consisting of polyesters, polyacrylic acid esters, polycarbonates, styrene acrylates, vinyl homo- and / or vinyl copolymers. Particularly suitable are vinyl polymers such as polyvinyl chloride, vinyl chloride / acrylate copolymer, vinyl chloride / vinyl acetate copolymer and / or vinyl chloride / vinyl acetate / vinylidene chloride.
• the dye-receiving layer may contain an inorganic and / or organic pigment.
• a finely divided inorganic pigment such as silica, alumina, alumina hydrate, aluminum silicate, calcium carbonate, zinc oxide, tin oxide, antimony oxide, titanium dioxide, indium oxide or a mixed oxide of these oxides.
• the pigments may be present individually or as mixtures in the dye-receiving layer.
• finely divided silicic acids in particular a finely dispersed silicic acid doped with aluminum, are contained in the layer.
• the amount of the pigment in the dye-receiving layer may be 10 to 90% by weight, especially 30 to 70% by weight, based on the mass of the dried layer.
• the finely divided pigment may have an average particle size of 10 nm to 2 ⁇ m.
• the dye-receiving layer may also contain other adjuvants, for example, anionic or nonionic surfactants, matting agents, dyes, crosslinking agents, lubricants, antiblocking agents, and other conventional additives.
• the amount of auxiliaries may be from 0.01 to 10% by weight, in particular from 0.05 to 5% by weight, based on the weight of the dried layer.
• the coating composition for forming the dye-receiving layer can be applied in-line or off-line with all customary in papermaking application units, the amount is chosen so that after drying the coating weight of at most 5 g / m 2 , in particular 0.1 to 3 g / m 2 or, according to a particularly preferred embodiment, 0.3 to 1.0 g / m 2 .
• the coating compositions for forming the barrier layer and the dye-receiving layer can be applied separately, ie first the coating composition produced to form the barrier layer is applied to the carrier material. In the next step, the coating composition for forming the ink-receiving layer is applied to the dried barrier layer and dried.
• coating compositions described above can also be applied "wet-on-wet", for example with a multi-layer curtain coating unit.
• a base paper A was made from eucalyptus pulp. For grinding, the pulp was ground as an approximately 5% aqueous suspension (thick matter) with the aid of a refiner to a freeness of 36 ° SR. The concentration of pulp fibers in the thin was 1 wt .-%, based on the mass of the pulp suspension.
• the thin stock additives were added as cationic starch in an amount of 0.4 wt .-% as an alkyl ketene dimer neutral sizing agent (AKD) in an amount of 0.48 wt .-%, wet strength agents polyamine-polyamide-epichlorohydrin resin (Kymene ®) in an amount of 0.36 wt .-% and a natural CaCO 3 in an amount of 10 wt .-%.
• the quantities are based on the pulp mass.
• the thinstock whose pH was adjusted to about 7.5, was transferred from the head box to the wire of the paper machine, followed by sheet formation by dewatering the web in the wire section of the paper machine.
• the base paper was painted on the front with a coating of a styrene-acrylate binder, starch and a pigment mixture of calcium carbonate and kaolin with a coating weight of 15 g / m 2 , dried, and then with a Calender smoothed.
• the paper produced in this way has on the front side a Bekk smoothness of 800 seconds, measured according to DIN 53107.
• the printed surface (front side) of the paper was laminated in the extruder after irradiation with a corona discharge with a three-layered biaxially oriented polypropylene film (HIPHANE BOPP, Hwaseung Industries Co., Ltd.) using a low-density polyethylene (LDPE) film. between the paper carrier material and the plastic film was extruded.
• the thickness of the adhesion-promoting polyethylene film was 8 g / m 2 .
• the cooling cylinder was chosen so that the resulting surface of the back has a roughness of 0.9 microns, measured as Rz value according to DIN 4768.
• the support material obtained was then coated on the side coated with the plastic film with the coating compositions A1 to A6 according to the invention (25-gauge wire rod) and dried at 78 ° C. for three minutes.
• the application rates of the coating compositions were chosen such that a dry application (barrier layer) was in each case 1.6 g / m 2 .
• the dye-receiving coating B was applied to the barrier layers (15 wire bar) and dried (2 minutes, 78 ° C).
• the application amount of the coating composition was chosen so that a dry application of 0.5 g / m 2 resulted.
• the composition of the coating compositions is given below in Table 1.
• coating slip B (dye-receiving layer)
• the coating composition C 25-wire squeegee
• the dye-absorbing coating composition B 15-wire bar
• the coating of the barrier layer after drying was 1.6 g / m 2.
• the application quantity of coating composition B was selected such that a dry application of 0.5 g / m 2 resulted.
• the carrier material and the dye-receiving coating composition were as in Examples 1 to 6.
• the compositions of the coating compositions C to G are shown in Table 2 below.
• composition C D e F G Desalinated water 83.52 82.85 83,40 82.85 83,40 Gelatin Imagel ® AP 71979, 290 Bloom, Isoelektr.
• the patterns are printed with the maximum color densities of yellow, cyan, magenta and black on the Mitsubishi CP-D70DW printer with standard donor ribbon.
• the print size is 10 x 15 cm and the color areas are 1 x 1 cm.
• These patterns are hung for 5 days at 80 ° C oven temperature. After 5 days, an evaluation of the dye penetration on the back of the printed pattern is made, this is done by means of school grades.
• test results are summarized in the following Table 3. recording material migration grade mottle grade A1 Invention Example 1 1 2 A2 Invention Example 2 1 1 A3 Invention Example 3 2 2 A4 Invention Example 4 2 1.5 A5 Invention Example 5 5 1 A6 Invention Example 6 5 1 C Vergl.Bspl.1 1 4 D Vergl.Bspl.2 2 4 e Vergl.Bspl.3 3 3 F Vergl.Bspl.4 2.5 4 G Vergl.Bspl.5 4 3
• the recording materials according to the invention after printing have a good to very good migration behavior for the dyes and no mottle effect.
• all of the tested recording materials of the present invention show excellent color density of the transferred image.

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• Physics & Mathematics (AREA)
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• 2014
  • 2014-12-05 EP EP14196562.4A patent/EP3028866B1/fr active Active
  • 2014-12-05 ES ES14196562T patent/ES2791719T3/es active Active
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• 2015
  • 2015-11-19 US US14/945,633 patent/US9604487B2/en active Active
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