JP2008200854A - Inkjet recording method for recording patterned layer and white solid coating layer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet recording method capable of achieving highly accurately a remote proofing in a package printing in a form to print a color image on a white ground by an inexpensive inkjet system and to provide a printed material obtained by this method. <P>SOLUTION: This inkjet recording method is to provide a non-white solid patterned layer P on a white solid coating layer W after the white solid coating layer W is provided on the surface of a film base material S under the condition that the ink for the white solid coating layer includes a porous inorganic pigment. This printed material is obtained by this method. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an ink jet recording method for recording a pattern layer (in particular, a color pattern layer) and a white solid coating layer, and a printed matter obtained by the recording method. ADVANTAGE OF THE INVENTION According to this invention, the remote proofing in the package printing of the style which prints a color image on a white background can be implement | achieved with high precision by an inexpensive inkjet system.

In packaging of products such as confectionery, it is widely performed that a paper outer box for packaging is covered with a transparent film, and a part of or the whole of the transparent film is printed with a color image arranged on a white background. Alternatively, it is also widely performed to print a color image on a white background on the surface of a packaging plastic bag. For these printings, offset printing and flexographic printing are usually used.
In the printing industry, not only high quality but also cost reduction and delivery time reduction are strictly demanded, and the use of digital data is progressing from design confirmation to the start of printing on this machine. For example, the workflow for producing printed materials includes creation of input data, DDCP (Direct Digital Color
Proofing), press plate production using CTP (Computer To Plate), and printing on this machine proceed in this order, and digital data is often sent by e-mail even in DDCP proofing work to confirm the submitted data. Has been done.
In the DDCP calibration work, the proofreader who received the digital data by e-mail and the design orderer not only perform the calibration work and confirmation work on the computer screen, but also perform the calibration and confirmation by actually printing on the paper. There is. In this case, an ink jet method, a toner method, a thermal transfer method, a halftone dot method, or the like is used as the output method. However, in printing with a color image arranged on a white background, the cheapest ink jet method is not always satisfactory. There was a problem that the output quality could not be obtained.

  On the other hand, as white ink for inkjet recording, ink containing titanium dioxide has been proposed (for example, Patent Documents 1 to 9). However, the use of these titanium dioxide-containing white inks for remote proofing by an inkjet method has never been proposed.

JP 60-118767 A JP-A-6-145570 JP-A-4-277766 JP 11-343443 A Japanese Patent Laid-Open No. 8-113746 JP-A-3-216379 JP-A-5-186725 JP 2002-348513 A JP 2003-253170 A

The present inventor has intensively studied a method for obtaining a high-quality image by using an inkjet method as an output method when performing remote proofing of a printed matter (for example, offset printed matter) in which a color image is arranged on a white background. As a result, it has been found that the object can be achieved by incorporating a porous inorganic pigment into the white solid coating layer ink.
The present invention is based on these findings.

  Accordingly, the present invention provides an ink jet recording method in which a white solid coating layer is provided on the surface of a film substrate, and then a non-white pattern layer is provided on the white solid coating layer. Contains a porous inorganic pigment, and relates to the recording method.

In a preferred embodiment of the method of the present invention, the porous inorganic pigment is titanium dioxide.
In another preferred embodiment of the method of the present invention, the non-white pattern layer is a color layer or a black to gray layer.
In still another preferred embodiment of the method of the present invention, a white solid coating layer is provided so as to cover the entire non-white pattern layer provided on the surface of the film substrate.
The present invention also relates to a printed matter obtained by the recording method.

  According to the recording method of the present invention, it is possible not only to obtain a high-quality print in which a color image is reflected on a clean white background, but also to prevent a phenomenon in which the quality of the white ink overflows on the color image and the quality is deteriorated. In addition, for example, it is possible to provide a printed matter that sufficiently satisfies the print quality required for the DDCP calibration work.

  In the recording method of the present invention, for example, as shown in FIG. 1, a white solid coating layer W and a non-white pattern layer P are sequentially provided on a film substrate S by an inkjet recording method to form a printed image. The printed image is observed from the printing surface side of the film substrate S as indicated by an arrow A in FIG. 1 and, for example, DDCP calibration work is performed.

  Examples of the film base material that can be used in the method of the present invention include polyester film, polyolefin film, resin film such as polyvinyl chloride, paper such as plain paper, coated paper, or tracing paper, and resin coating. Paper or synthetic paper can be used.

In the method of the present invention, as a white ink composition for a white solid coating layer, any porous inorganic pigment-containing white ink composition usually used in an ink jet recording method can be used.
Examples of porous inorganic pigments include colloidal silica, alumina sol, boehmite sol, synthetic fine particle silica, synthetic fine particle alumina silicate, vapor phase synthetic silica, zeolite, montmorillonite group mineral, beidellite group mineral, saponite group mineral, hectorite group mineral. , Stevensite mineral, hydrotalcite mineral, smectite mineral, bentonite mineral, calcium carbonate, magnesium carbonate, calcium sulfate, barium sulfate, titanium dioxide, titanium sol, zinc oxide, zinc carbonate, aluminum silicate, calcium silicate, silicic acid Magnesium, Kaolin, Talc, Aluminum oxide, Aluminum hydroxide, Polyaluminum hydroxide compound, Alumina hydrate, Plastic pigment, Urea resin pigment, Cellulose particles, Starch particles, Clay, Such as Chin white. Among them, colloidal silica, alumina sol, boehmite sol, synthetic particulate silica, or titanium dioxide are preferred.

  The content of the porous inorganic pigment in the white ink composition used in the method of the present invention can be, for example, 5 to 20% by weight. When the content of the porous inorganic pigment is 5% by weight or more, sufficient whiteness can be obtained. On the other hand, if it is 20% by weight or less, a sufficient amount of the ink binder resin component necessary for ensuring the viscosity required for the ink composition for ink jet printing can be contained, and as a result, sufficient printing adhesion can be achieved. Sex can be secured.

  In addition to the porous inorganic pigment, the white ink composition used in the method of the present invention includes various components usually contained in an ink composition for inkjet printing, such as a resin component, a dispersant component, a solvent component (especially water), and the like. Can be contained. Moreover, as a white ink composition containing a porous inorganic pigment as a white colorant, for example, a composition described in JP-A-2002-348513 (Patent Document 8) or JP-A-2003-253170 (Patent Document 9). Can also be used.

  The non-white ink composition for the non-white pattern layer used in the method of the present invention is, for example, a color ink composition, a black ink composition, or a gray ink composition. Examples of the color ink composition include a cyan ink composition, a magenta ink composition, a yellow ink composition, a light cyan ink composition, a light magenta ink composition, and a red ink composition and a green ink composition. Or a blue ink composition. As the non-white ink composition, the various ink compositions described above can be used alone or in combination of two or more.

  As the non-white ink composition, any non-white ink composition usually used in the ink jet recording method can be used, and a water-based ink composition containing a dye or a pigment as a colorant component is preferably used. In particular, it is preferable to use an ink composition that exhibits good characteristics (for example, color developability and fixability) with respect to the transparent film substrate or the ink receiving layer.

  In the method of the present invention, since the white solid coating layer contains a porous inorganic pigment, the white solid coating layer exhibits an action as an ink receiving layer for the non-white pattern layer printed from above the white solid coating layer. Become. Therefore, even if a higher density non-white pattern layer is printed after the white solid coating layer is printed at a high density, the ink of the non-white pattern layer does not overflow on the white solid coating layer. Thus, a high-quality printed matter having a high-density color pattern on a dense white background can be obtained.

  The method of the present invention can be suitably used when a printed material (for example, an offset printed material) in which a color image is arranged on a white background is remotely proofed and actually printed on a sheet for calibration and confirmation. In general, a printed matter in which a color image is arranged on a white background is provided on the surface of a transparent film substrate, and can be widely used in a printing method in which observation is performed from a non-printing surface.

  EXAMPLES Hereinafter, the present invention will be specifically described by way of examples, but these do not limit the scope of the present invention.

<Example 1>
Two inkjet printers [PX-A650; manufactured by Seiko Epson Corporation] were prepared. One of the printers used as a color output printer was loaded with a genuine ink cartridge. The other was a white output printer. That is, the black ink cartridge is filled with white ink, and the white ink cartridge is usually used in a portion where the black ink cartridge is installed. As the white ink, white ink (solid content concentration: 17%) prepared by adding 120 parts by weight of titanium dioxide and 20 parts by weight of binder resin (PVA R1130; manufactured by Kuraray) to water and dispersing it was used. Further, a polyethylene terephthalate (PET) film substrate was used as the recording medium.

First, using a white output printer, a white background portion was output to the film base material, and left to dry for several minutes. In this white background printing, printing was performed so that the entire color image portion to be printed later can be placed on the white background portion. Subsequently, using a color output printer, a color image was output on the white background portion to provide a non-white pattern layer. The recording resolution of the non-white pattern layer was 1440 × 720 dpi.
When the obtained printed image was observed from the printing surface of the transparent film for inkjet, the whiteness was extremely high, and the whiteness of the white portion having no color image was particularly excellent. Also, since the resolution of the color image is high, the color image can be seen vividly and delicately.

  According to the method of the present invention, for example, remote proofing in package printing in which a color image is printed on a white background can be realized with high accuracy by an inexpensive inkjet method.

It is sectional drawing which shows typically the layered structure of the printing image formed on a film base material by the method of this invention.

Explanation of symbols

S: Film base; P: Non-white pattern layer; W: White solid coating layer.

Claims (5)

  An ink jet recording method in which a non-white pattern layer is provided on a white solid coating layer after providing a white solid coating layer on the surface of the film substrate, wherein the white solid coating layer ink comprises a porous inorganic pigment. The recording method described above, comprising:   The method of claim 1, wherein the porous inorganic pigment is titanium dioxide.   The method according to claim 1, wherein the non-white pattern layer is a color layer or a black or gray layer.   The method as described in any one of Claims 1-3 which provides a white solid coating layer so that the whole non-white pattern layer provided on the surface of a film base material may be covered.   Printed matter obtained by the method according to any one of claims 1 to 4.

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