JPS599086A - Retransfer printing mode - Google Patents

Abstract

PURPOSE:To exactly print the pictures of a printing plate even on a three-dimensional face as well as to obtain an inexpensive printing plate by a method in which ink is transferred from a photo-sensitive resin plate to an intermediate transfer material and then retransferred from the intermediate transfer material to a face to be printed. CONSTITUTION:Ink is coated on the plate face of a photo-sensitive resin plate 1, an intermediate transfer material 3 is pressingly contacted with the plate face to transfer the ink to the face of a bag 3b, and then the intermediate transfer material 3 is pressed on a face 4 to be printed to retransfer the ink transferred to the face 4 to be printed. In such a printing method, heating the intermediate transfer material 3 by a fluid heated by a heater 3e permits the transferring efficiency of the ink of the plate to the intermediate transfer material 3 to enhance and also even the retransferring efficiency of the ink of the intermediate transfer material to the face 4 to be printed to enhance. Furthermore, the drying speed of the ink on the face 4 being printed can also be hastened.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a printing method in which ink is transferred from a plate to an intermediate transfer member, and then transferred from the intermediate transfer member to a printing surface.

Conventionally, the above-mentioned retransfer printing method uses a metal letterpress plate made of aluminum or the like or a screen like that used for textile printing. Therefore, when printing on a three-dimensional surface, which is a feature of the retransfer printing method, there is also the problem that an image must be formed on a flat plate, taking into account the deformation caused by printing on a three-dimensional surface. Ta.

The present invention was made based on the idea that all of the above-mentioned problems can be solved by using a photosensitive resin plate in a retransfer printing method, and the present invention is based on the idea that all of the above problems can be solved by using a photosensitive resin plate for the plate. The retransfer printing method is characterized by:

Hereinafter, the method of the present invention will be explained based on illustrated examples.

FIG. 1 is a cross-sectional view showing the state of transfer to the intermediate transfer body;
FIG. 2 is a sectional view of the intermediate transfer member, and FIG. 3 is a side view showing a state in which the intermediate transfer member is being retransferred.

In the figure, / is a photosensitive resin plate, λ is a plate base, 3 is an intermediate transfer body, V is a printing surface when the printing medium is a ball,
The plate surface of the photosensitive resin plate has a spherical surface similar to that of the printing target, and the intermediate transfer body 3 has a bag body 3b made of an elastic material such as rubber attached to a base body 3a, and a fluid such as water is injected into the interior of the bag body 3b. 3C is a fluid supply pipe, 3d valve, 3e is a heater for heating the fluid, 3f is a humidity sensor,
3g is a control circuit that controls the drive of the heater 3e based on information from the humidity sensor 3f.

Ink is applied to the plate surface of a photosensitive resin plate, and the intermediate transfer body 3 is pressed onto the plate surface as shown in FIG. 1 to transfer the ink to the surface of the bag body 3b. Printing is performed by pressing the ink onto the printing surface t as shown in FIG. 3 and retransferring the transferred ink onto the printing surface t. Here, heating the intermediate transfer body 3 by heating the fluid by the heater 3eK as in the illustrated example increases the transfer efficiency of the printing plate ink to the intermediate transfer body 3, and also increases the transfer efficiency from the intermediate transfer body to the printing surface ψ. This has the effect of increasing the re-transfer efficiency and also increasing the drying speed of the ink on the printing surface.

Since the retransfer printing method of the present invention uses a photosensitive resin plate, not only the plate can be obtained at low cost, but also a plate with a three-dimensional plate surface as shown in the illustrated example can be easily obtained. Even when printing on a three-dimensional surface, an excellent effect can be obtained in that the image on the plate can be accurately printed. Note that the illustrated example shows a plate obtained using a 7-oto-relief type photosensitive resin, but when a photoresist type photosensitive resin is used, the resin that remains undissolved on the plate base surface is removed from the plate. It may be something that forms an image.

Further, in the present invention, the plate surface may be flat, and therefore the intermediate transfer body may also be flat.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the state of transfer to the intermediate transfer body;
2 and 2 are cross-sectional views of the intermediate transfer body, and FIG. 3 is a side view showing a state in which the intermediate transfer member is being retransferred. l...Photosensitive resin plate making, c...plate base, 3...intermediate transfer body, q...printing surface. High 10 grade 2 drawings

Claims (1)

[Scope of Claims] 1. A printing method in which ink is transferred from a plate to an intermediate transfer body, and then transferred from the intermediate transfer body to a printing surface, characterized in that a photosensitive resin plate is used for the plate. Transfer printing method. 2. The retransfer printing method according to claim 1, wherein the plate surface of the photosensitive resin plate forms a three-dimensional front surface, and the intermediate transfer body has a transfer surface that is elastically deformable so as to stain the three-dimensional surface of the plate surface. 3. The retransfer printing method according to claim 2, wherein the intermediate transfer body has a structure in which a bag made of an elastic material is attached to a base body and filled with fluid.