JPS63118747A - Method for etching organic material - Google Patents

Abstract

PURPOSE:To prevent the scratching and staining of the rear side of the support of an org. material having an org. polymer-contg. layer by immersing the org. material in a soln. capable of etching the org. polymer-contg. layer and by applying ultrasonic vibration to etch the layer. CONSTITUTION:An org. material having an org. polymer-contg. layer to be etched on the support is immersed in a soln. capable of etching the org. polymer- contg. layer and ultrasonic vibration is applied to etch the layer. For example, a material contg. gelatin as a binder and having a silver image formed on the support by a DTR process (silver complex salt diffusion transfer process) is immersed in an etch bleaching soln. and ultrasonic vibration is applied. After the lapse of several sec - several min, the material to be etch-bleached is taken out of the soln. Etch bleaching is completed without touching the etch bleaching soln. and a clear etch-bleached image can be obtd. Thus, processing not accompanied by scratching or staining can be carried out.

Description

Detailed Description of the Invention (A> Industrial Application Field The present invention relates to a method of etching an organic polymer substance-containing layer on a support with a solution capable of etching the organic polymer substance-containing layer. , especially silver salt diffusion transfer method (DT
The present invention relates to a processing method suitable for etching a silver image layer using an organic polymer as a binder on a support obtained by a silver halide emulsion photographic processing method including R method).

(B) Conventional technology and its problems A silver image layer containing gelatin as a binder on a support obtained by a silver halide emulsion photographic processing method including a silver complex diffusion transfer method (DTR method) is subjected to an etching bleaching process. It is well known that prior to etching and bleaching, a water-soluble dye is used to form a colored image, which is then used for posters, catalogs, overhead manuscripts, VTR captions, and the like.

For example, as a known application example using the DTR method, an image-receiving material having an image-receiving layer pre-colored with yellow, magenta, cyan, blue, red, green, etc. on a transparent film is used for DTP development. A processing method for forming an image in which the unremoved areas are colored by etching and bleaching the silver image area is Aguf 7.
- It is commercially available from Gewald under the trade name Copy Chrome. Other examples include a processing method commercially available from Shakensha under the trade name Irotsuku and a processing method commercially available from Mitsubishi Paperback under the trade name EB Color System, which is a silver halide emulsion photographic processing method including the DTR method. In this processing method, the silver image area in the binder obtained by the process is subjected to an etching bleaching process, and the remaining non-silver image area of the binder is colored with a water-soluble dye to form a colored image. In these processing methods, the etching bleaching process is performed by rubbing the binder layer on the support using absorbent cotton or the like in order to remove the binder in the silver image area.

In this treatment step, the back surface of the support is often scratched or stained depending on the material, shape, etc. of the table on which the support is placed. Furthermore, a major problem is that the binder layer on the support is rubbed by hand using absorbent cotton, etc.
Even non-silver image areas that were not supposed to be etched and bleached were sometimes damaged. This phenomenon occurs significantly when the non-silver image area is in the form of thin lines, and sometimes the line image disappears.

Conventionally, in the etching bleaching process, a smooth plate or glass plate, etc. was selected as the base on which the support was placed, and when performing the etching bleaching process, careful consideration was given to manual handling. I'm rubbing it with If the area of the support is large, the surrounding area is fixed with adhesive tape to make it easier to rub, but if the area of the support is small,
This method cannot be used and requires more caution.

(C) Object of the Invention An object of the present invention is to provide a processing method that solves the various difficulties of the conventional processing methods described above.

(D> Structure of the invention, that is, the present invention involves immersing an organic material having an organic polymer substance-containing layer to be etched on a support in a solution capable of etching the organic polymer substance-containing layer. The method of etching an organic material is characterized in that the layer is etched by applying ultrasonic imaging to the immersed portion.

The present invention will be explained in more detail below.

In a processing method in which a silver image layer using gelatin as a binder on a support obtained by a silver halide emulsion photographic processing method including the DTR method is subjected to an etching bleaching treatment and colored with a water-soluble dye to form a colored image. Therefore, the etching bleaching process can be easily performed by the method described below.

That is, an etching bleach solution is placed in a device capable of oscillating ultrasonic waves. The liquid amount is 'room~'1ooor
It may be about Iil, but there is no limitation.

A material to be etched and bleached using gelatin as a binder and having a silver image on a support using the DTR method is immersed in the above-mentioned etching bleach solution, and imaged by ultrasonic waves. After a few seconds to a few minutes, remove the etching bleach material.
Remove from etching bleach solution.

By the above method, etching bleaching is completed without touching the etching bleaching liquid, and a clear etching bleaching image can be obtained.

Excavation output 50W to 12 as ultrasonic waves used in the present invention
00W1 Shooting frequency 20KHz ~ 50KHz is used, but is not limited to this. Generally, it is used for cleaning medical instruments, physical and chemical instruments, optical lenses, watch lenses, precision machinery parts, etc. An ultrasonic cleaner can be used.

Such ultrasonic cleaners are commercially available from many manufacturers, mainly scientific equipment manufacturers. For example, Nippon Seiki Seisakusho NS-50-0,5V, NS-100-2V, Kagaku Kyoeisha UA50. UA100. Sogo Science Glass Manufacturing C
A-2481A, 0A-3481A, Yamato Kagakusha 12
Type, 32 type, Inner Tank Manufacturing MS-5OR, MS-7OR,
It is commercially available under trade names such as Nippon Rikagaki Kikai Co., Ltd. NC-300 type and NU100.

Etching bleach liquids are commercially available under the trade names of Copychrome CP-299A and CP-299B from Agfa Gewald, Irotsu A liquid and B liquid from Shakensha, and EB Color System EC liquid and EH liquid from Mitsubishi Paperback. Although,
For example, the following prescription liquid is used.

etching bleach solution ■Mix liquid A and liquid B to make 1.

Also, an etching bleach material using gelatin as a binder and having a silver image on a support is prepared using the DTR method. The DTR method is well known and has various uses. For example, it is possible to obtain silver images with high contrast, high resolution, and high density, and is used for document reproduction, preparation of original manuscripts, etc. As a known method, a photosensitive material in which a silver halide emulsion (for example, silver iodobromide, silver bromide, silver chloride, silver chlorobromide, etc.) with gelatin as a binder is coated on resin-coated paper is used as a negative material, Take an image with a suitable camera and expose it to light. The exposed negative material can be prepared using alkaline substances (e.g. sodium hydroxide, potassium hydroxide, etc.), silver halide solvents (e.g. sodium thiosulfate,
ammonium thiothianate, etc.), preservatives (e.g., sodium sulfite, etc.), 11M agents (e.g., hydroxyethylcellulose, carboxymethylcellulose, etc.), antifoggants (e.g., potassium bromide, 1-phenyl-5-mercaptotetrazole, etc.) etc.), and if necessary, using a processing solution containing a developer (e.g., hydroquinone, 1-phenyl-3-pyrazolidone, etc.), a physical development nucleus with gelatin as a binder is formed on a support such as a polyester film or resin-coated paper. A method is known in which diffusion transfer development is performed on an image-receiving layer containing (for example, sulfide of gold, silver, platinum, palladium, cadmium, etc., or selenide).

(E) Example Next, the present invention will be explained in more detail with reference to Examples.

Example 1 A surfactant and a matting agent were added to an aqueous latex of glycidyl methacrylate: hydroxyethyl methacrylate: ethyl acrylate copolymer at a weight ratio of 60:10:30 on a 100-cape polyethylene terephthalate film, and the solid content was 500 mg/butt. Apply as desired. On this layer is a gelatin image-receiving layer containing palladium sulfide nuclei containing 1 ml of 2-4-dichloro-6-hydroxy-8-triazine sodium salt (5% aqueous solution) (gelatin 2.5 g/m2).
) was established. On the other hand, a gelatin undercoat layer containing carbon black was provided on polyethylene laminated paper, and silver chlorobromide (silver bromide 5 mol%) with an average particle size of 0.25 microns was applied on top of the gelatin undercoat layer containing carbon black.
A negative material was prepared by coating an ortho-sensitized gelatin emulsion containing 2 g/TIt in terms of silver nitrate and drying.

This negative material is 10μ, 20μ, 30μ, 40μ, 5
Contact exposure was carried out using negative transmission film originals with line width images of 0μ, 60μ, 70μ, 80μ, 90μ, and 100μ.

This exposed negative material was subjected to DTR development on the above-mentioned image-receiving material using the following developer to produce an image-receiving material having a negative silver image having a line width image every 10 μm from 10 μm to 100 μm.

The image receiving material was then washed with water for about 30 seconds and dried.

An etching bleach solution with the following formulation was prepared.

Adjust the temperature of the etching bleach solution to 20℃, and use an ultrasonic cleaner (Yamato Scientific Co., Ltd. BRANSONIC MODEL-
12> for 500 d to oscillate ultrasonic waves. The DTR-treated image receiving material was immersed in the solution for 10 seconds to perform etching bleaching. The image receiving material was taken out from the etching bleach solution, washed with water for about 10 seconds, and dried.

Meanwhile, soak absorbent cotton in a 20'C etching bleach solution and apply it on another layer of DTR-treated image-receiving material for about 1 hour.
After 0 seconds, the absorbent cotton was rubbed over the layer. About 1 image receiving material
Washed with water for 0 seconds and dried.

As a result of observing the image of the image-receiving material that was etched and bleached using the image processing method using a 50x magnification looper, the minimum line width that could be etched and bleached using the conventional processing method of rubbing with absorbent cotton was a line width image of 50μ. . In the ultrasonic processing method, etching and bleaching was achieved up to a line width of 30μ.

In addition, as a result of measuring the line width of etched and bleached line images, it was found that when processed using ultrasonic waves, the line width was exactly the same as that of the original, but when processed using the rubbing method with absorbent cotton, the lines became thicker by about 5μ on average. Ta. Furthermore, as a result of observing the edges of the line image, it was found that the edges were clearly etched and bleached in a straight line when using the ultrasonic processing method.

In the conventional rubbing method using absorbent cotton, the edges were etched and bleached in a wavy manner, and many scratches were also observed in the non-silver image areas.

Example 2 In the same manner as in Example 1, an image-receiving material finished by both etching and bleaching methods was colored with a water-soluble dye. As a result of observing the colored image-receiving material by sandwiching it between transparent glass plates and shining light from behind, the image was clearer with the ultrasonic processing method, and there were no scratches or stains at all. On the other hand, the conventional processing method of rubbing with absorbent cotton resulted in pinhole-like scratches on the image and poor clarity.

(F) Effects of the Invention According to the processing method of the present invention, the organic polymer substance-containing layer on the support can be easily etched down to fine line image areas.
The etched image is clear and there are no scratches, stains, etc. using this processing method. In addition, etching can be carried out without touching the processing solution, so this processing method has many advantages for the user.

Furthermore, the processing method of the present invention can also be applied to the development of PS plates, plates in the silk printing industry and the textile printing industry.

Claims (1)

[Claims] An organic material having an organic polymer substance-containing layer to be etched on a support is immersed in a solution capable of etching the organic polymer substance-containing layer, and ultrasonic vibration is applied to the immersed part. . A method for etching an organic material, comprising etching the layer.