JPH112891A - Manufacturing method for postcard photos - Google Patents

Abstract

(57) [Problem] To provide a method for efficiently forming a protective coating layer on an image surface when manufacturing a postcard. SOLUTION: A postcard having a step of drying a photographic print on which an image is formed by a development process, a step of applying a protective coating layer on the image side of the photographic print, and a step of attaching a postcard to the photographic print in this order. How to make a photo.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a postcard photograph.

[0002]

2. Description of the Related Art Photos with postcards are generally called postcards, and are often used in recent years as a means of transmitting information using photographs, such as reports of marriage and the birth of children, as well as customs such as greetings at the beginning of the year and seasonal visits. There is a tendency. However, since the image surface of this post card is made of a photographic print mainly composed of a hydrophilic binder, it is vulnerable to moisture. Even if a small amount of water drops adheres to the surface, the image quality changes, fingerprints easily adhere, and sticking occurs. In addition, there are many opportunities for fingerprints and stains to adhere due to sorting work and delivery work in the mailing process. Furthermore, during mailing, the user may be exposed to severe weather conditions, such as rain or snow, and may stick to other mails, causing a loss of an image or soiling other mails.

[0003] In order to overcome the drawback of photographic prints against moisture, a protective layer has conventionally been provided on the image recording surface. For example, JP-A-53-57023, JP-A-61-201248 and JP-A-62-21150 disclose that a radiation-curable resin is applied and cured by radiation.
No. 0 can be laminated with an image recording surface.
JP-A-2-247370 and JP-A-6-110169 describe that the protective coating layer is formed of resin latex, and JP-A-3-212640 describes that the protective coating layer is formed of ionic polyester. I have.

[0004]

By the way, normally, a postcard photograph is a negative film image, or a negative film image and characters or illustrations are printed on a photographic light-sensitive material for printing and developed, and the postcard is printed on the back of the resulting print. It is manufactured by bonding. There are two types of lamination: a method of laminating a postcard and a postcard cut to a predetermined size, and a method of laminating a postcard on the back of each photo frame printed on a long photosensitive material. ,
The latter method is mainly adopted from the viewpoint of workability.

[0005] As a method of sticking, Japanese Unexamined Patent Publication No.
There are a method using a double-sided pressure-sensitive adhesive tape described in JP-A-70858 and a method using an adhesive or a pressure-sensitive adhesive described in JP-A-63-246290, but the latter is mainly used in terms of cost and workability. Have been.

An object of the present invention is to provide a method for efficiently forming a protective coating layer on an image surface when manufacturing a postcard in order to solve a problem peculiar to the postcard.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to dry a photographic print on which an image has been formed by a developing process, to apply a protective coating layer on the image side of the photographic print, and to provide a photographic print. This is achieved by a method for manufacturing a postcard photograph having a step of attaching a postcard in this order.

In the present invention, the step of applying and drying the protective coating layer is provided before the step of bonding the postcard to the back of the photographic print, so that the adhesive or pressure-sensitive adhesive used for bonding the postcard is used. Even if it goes behind the image side, the adhesive or the pressure-sensitive adhesive can be removed without damaging the image side. Further, the protective coating layer has the effect of protecting the image from the pressure-bonding means (roller or the like) used in the laminating step to prevent abrasion and loss of the image.

If a step of forming a protective coating layer is provided after the postcard laminating step, the coating liquid for forming the protective coating layer runs back and causes stains on the postcard surface, or causes deterioration in writing properties. Further, when the protective coating layer is dried, the water content of the postcard evaporates and the postcard may be curled, and the adhesive surface of the photoprint and the postcard may be peeled off.

In the present invention, a plurality of images are serially exposed on a long photographic photosensitive material for printing at a constant interval.
From the viewpoint of working efficiency, it is preferable to continuously apply a coating liquid for forming a protective coating layer to the material after the development and drying to form a protective coating layer, and after attaching the postcard, cut into a postcard size. As a method for continuously applying the coating liquid for forming the protective coating layer, any known method can be adopted. However, it is desirable to select an optimum method depending on the type of the coating liquid. Specifically, dip coating, roll coating , Gravure coating, air knife coating, extrusion coating, curtain coating, wire bar coating, a method of applying with a liquid that oozes out from a cloth or a sponge-like substance, and the like.

When the production amount is small, a photographic print may be cut into cards for each frame, a protective coating layer may be applied on the image surface, and then a postcard may be attached. In this case, as a method of applying the protective coating layer, a method described in JP-A-1-193866 can be employed.

The protective coating layer is described, for example, in JP-A-53-57.
Nos. 023, 61-201248, and 62-211
Radiation-curable resin described in No. 50;
Resin latex described in JP-A-370 and JP-A-6-110169; ionic polyester resin described in JP-A-3-212640; polyurethane resin and the like, particularly preferably formed from thermosetting water-soluble polyurethane resin. It is to be. In addition, the thermosetting type here includes both the thermoreactive type and the thermoplastic type.

Examples of the water-soluble or aqueous polyurethane emulsion include a heat-reactive polyurethane emulsion of a relatively low to medium molecular weight utilizing a blocked isocyanate group and a heat-reactive polyurethane emulsion of a relatively high molecular weight mainly comprising a linear structure. And a plastic polyurethane emulsion. These are self-emulsifying or dispersing by introducing hydrophilic groups such as anions, cations and non-ions into the urethane resin skeleton, or dispersing in water by adding an emulsifier to a hydrophobic resin.

[0014]

EXAMPLES The present invention will be described below in detail with reference to examples, but embodiments of the present invention are not limited thereto.

FIG. 1 shows an example of a schematic process of applying a protective coating layer on the image side of a photographic print of the present invention.

In FIG. 1, a long photographic paper P is unwound from a long photographic paper roll 1 on which photographic images are printed in series at regular intervals, and is guided by guide rolls 2 while being transported. 3, a coating liquid for forming a protective coating layer 4
Is applied to the image side. Thereafter, the sheet is conveyed to the drying unit 5, dried, and taken up by the take-up roll 6. The thickness of the protective coating layer is determined by the number of rotations of the blade 7 and the coating roll 3 and the transport speed of the long photographic paper P.

Automatic developing machine RTV2-2 manufactured by Noritsu Koki Co., Ltd.
Using No. 06, a long photographic paper on which 500 photographic images were printed in series at regular intervals was prepared and wound up in a roll. The obtained photographic paper roll was set in the coating and drying apparatus shown in FIG. 1 to apply a protective coating layer having a dry film thickness of 2 μm. At this time, the transport speed of the photographic paper was 2 m / min, and as the coating liquid for forming the protective coating layer, a water-based urethane resin manufactured by Daiichi Pharmaceutical Co., Ltd., Superflex 410 was used.
An anis roll (manufactured by Asahi Roll Co., Ltd.) (oblique line, number of lines: 90) was used as the application roll 3 and rotated in the opposite direction to the photographic paper transport direction.
The applied amount of the coating solution was controlled by this rotation speed. The drying temperature was 80 ° C.

Thereafter, an automatic sticking machine PCH4 manufactured by Nexus Corp.
At 000, a postcard was attached and cut, and 500 postcards were prepared.

On the other hand, 500 postcards were prepared in the same manner except that the protective coating layer was not applied. Thereafter, using a coating apparatus described in JP-A-1-193866, a coating liquid for forming a protective coating layer was applied so as to obtain a dry film thickness of 2 μm by sheet-like application. At that time, the transfer speed was similarly 2 m / min, the insertion of the post card into the coating device was performed manually, and the film thickness was adjusted by the solid content concentration of the coating solution. Drying was carried out at 80 ° C. using the drying section of the apparatus shown in FIG. 1 as a belt transport.

The following evaluations were made on the obtained postcards by the respective methods.

(Evaluation of Workability) The time required to create 500 postcards from a photographic paper roll having a photographic print is used as a workability parameter.

(Evaluation of Stain on Postcard Side) The number of stains which can be visually recognized on the postcard was counted.

(Evaluation of curl of postcard) Ten sheets are randomly selected from 500 sheets, and the curl degree immediately after the preparation (reverse number of the radius of curvature r from the center of curvature O of the postcard curled in the width direction to the unit m) ) Were measured and averaged.
The larger this value is, the larger the curl of the post card is.

(Evaluation of Peeling of Adhesive Surface of Photograph and Postcard)
By touching the outer periphery of the post card immediately after the preparation, the number of sheets on which the peeling off of the adhesive surface occurred even slightly was counted.

The results are shown below.

Workability Dirt on postcard side Curling degree Peeling of adhesive surface (min) (sheet) (1 / m) (sheet) Present invention 63000 Comparison 118 5 22 2

[0027]

As shown in the examples, according to the present invention,
It is possible to provide a method for efficiently forming a protective coating layer, which does not cause contamination in a manufacturing process or poor adhesion between a photographic print and a postcard.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a schematic process of a step of applying a protective coating layer on an image surface side of a photographic print.

[Description of Signs] 1 Roll of long photographic paper 2 Guide roll 3 Coating roll 4 Protective coating layer forming coating liquid 5 Drying unit 6 Winding roll 7 Blade P Long photographic paper

Claims (1)

[Claims] 1. A method comprising: drying a photographic print on which an image has been formed by a development process; applying a protective coating layer on the image side of the photographic print; and attaching a postcard to the photographic print in this order. A method for producing a postcard photograph.