The present invention pertains to the technical field of packaging, and relates to a system and a method for manufacturing strips containing labels with variable information printed by thermal transfer. A method is provided comprising the steps of supplying a support strip comprising a substrate and a release coat; applying and drying a layer of protective varnish; applying and drying at least one identification layer, forming at least one label; printing variable information on each label by thermal transfer; applying and drying a layer of adhesive varnish. The protective varnish is a copolyester varnish, and the thermal transfer takes place at a temperature of 30 C. or less. A system capable of implementing said method is also provided. The proposed solution makes it possible to obtain high printing speeds on the line for producing strips comprising weather-resistant labels.

The present invention is a method for measuring the varnish film thickness of a printed article by obtaining the film thickness of varnish on a sheet (1) on which a pattern is printed on a base thereof with ink and the pattern is coated with the varnish, wherein a metal foil (1c) having a smooth surface is attached to the base of the sheet (1), and the film thickness of the varnish coated directly over the metal foil (1c) is detected with a spectral interference-type film thickness meter (81) so as to determine whether the film thickness of the varnish is acceptable or not on the basis of the results detected by the spectral interference-type film thickness meter (81).

The present invention is a method for measuring the varnish film thickness of a printed article by obtaining the film thickness of varnish on a sheet (1) on which a pattern is printed on a base thereof with ink and the pattern is coated with the varnish, wherein a metal foil (1c) having a smooth surface is attached to the base of the sheet (1), and the film thickness of the varnish coated directly over the metal foil (1c) is detected with a spectral interference-type film thickness meter (81) so as to determine whether the film thickness of the varnish is acceptable or not on the basis of the results detected by the spectral interference-type film thickness meter (81).

A double-sided varnishing apparatus includes a varnishing unit configured to apply varnish to both surfaces of a sheet, and an additional processing unit configured to perform additional processing on the sheet on an upstream side in a sheet conveyance direction with respect to the varnishing unit. The additional processing unit includes a first embossing unit, and a special unit located on the upstream side in the sheet conveyance direction with respect to the first embossing unit. The special unit is one of an offset printing unit, a flexographic printing unit, and a second embossing unit. These units are interchangeable with each other. Value can be added to a polymer-made sheet.

A double-sided varnishing apparatus includes a varnishing unit configured to apply varnish to both surfaces of a sheet, and an additional processing unit configured to perform additional processing on the sheet on an upstream side in a sheet conveyance direction with respect to the varnishing unit. The additional processing unit includes a first embossing unit, and a special unit located on the upstream side in the sheet conveyance direction with respect to the first embossing unit. The special unit is one of an offset printing unit, a flexographic printing unit, and a second embossing unit. These units are interchangeable with each other. Value can be added to a polymer-made sheet.

A method for printing on a water-soluble material which comprises the following steps: a) ink jet printing an ink onto a water-soluble material so as to form an image wherein the ink comprises a self-dispersible pigment which comprises a carboxy-functional dispersant crosslinked around a pigment core by a cross-linking agent having at least two groups selected from oxetane, carbodiimide, hydrazide, oxazoline, aziridine, isocyanate, N-methylol, keteneimine, isocyanurate and epoxy groups; b) overprinting the image formed in step A) with a water soluble overprint varnish, also printed material and inks. Also inks, ink-sets and printed water-soluble material.

A printing device based on digital printing and a printing method based on digital printing are disclosed, wherein the printing device comprises a rack and a platen, wherein the rack is provided with a plurality of functional zones, the functional zones comprise a feeding zone, an underpainting printing zone, a pattern printing zone and an unloading zone; the platen is used for placing a medium to be printed, and is transferred among the feeding zone, the underpainting printing zone, the pattern printing zone and the unloading zone to achieve a continuous printing process. Therefore, only a digital printing device is needed to complete the underpainting and pattern printing, without incorporating a silk net printing machine and an ink jet printing machine, which is advantageously saving the enterprise cost, omitting a step of materials transferring among different equipment, and improving the production efficiency.

An image-forming device includes a printing portion that forms images on the media being transported using ink, a varnish application portion that applies aqueous varnish to the media on which the images are formed, a treatment portion that performs a treatment on the media so that a stickiness evaluation value which is a stickiness evaluation value indicating a degree of stickiness of the aqueous varnish applied to the media when the media to which the aqueous varnish is applied are output from the varnish application portion and is derived using a damped vibration percentage of a pendulum caused to do pendulum motions from an arbitrary location of the media to which the aqueous varnish is applied as a pivot reaches 0.24 or less, and an accumulation portion that accumulates the media to which the aqueous varnish is applied and on which the treatment is performed.

An image-forming device includes a printing portion that forms images on the media being transported using ink, a varnish application portion that applies aqueous varnish to the media on which the images are formed, a treatment portion that performs a treatment on the media so that a stickiness evaluation value which is a stickiness evaluation value indicating a degree of stickiness of the aqueous varnish applied to the media when the media to which the aqueous varnish is applied are output from the varnish application portion and is derived using a damped vibration percentage of a pendulum caused to do pendulum motions from an arbitrary location of the media to which the aqueous varnish is applied as a pivot reaches 0.24 or less, and an accumulation portion that accumulates the media to which the aqueous varnish is applied and on which the treatment is performed.

A method for printing on a water-soluble material which comprises the following steps: a) ink jet printing an ink onto a water-soluble material so as to form an image wherein the ink comprises a self-dispersible pigment which comprises a carboxy-functional dispersant crosslinked around a pigment core by a cross-linking agent having at least two groups selected from oxetane, carbodiimide, hydrazide, oxazoline, aziridine, isocyanate, N-methylol, keteneimine, isocyanurate and epoxy groups; b) overprinting the image formed in step A) with a water soluble overprint varnish, also printed material and inks. Also inks, ink-sets and printed water-soluble material.