JPS607260B2 - photosensitive material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a photosensitive material having a photosensitive layer on a support, the main components of which are a diazoamino compound, a photosensitive coupler, and a sensitizer that is sensitive to light with a wavelength of 550 mm or longer. .

In the present invention, a diazoamino compound is generated by irradiating light with a short wavelength of less than 550 degrees, that is, active rays, to generate a diazo compound, and then irradiated with sufficient light to decompose it into a compound that does not couple with a coupler. Some couplers coexist with a sensitizer that is sensitive to light with a wavelength of 550 or more.
This method takes advantage of the property that coupling activity is lost when irradiated with light of a higher intensity than that of the light source.

An original image having a positive image is superimposed on a photosensitive material having a photosensitive layer containing a diazoamino compound, a photosensitive coupler, and a sensitizer as main components on a support, as described above, and light of a wavelength of 550 or more is produced. When irradiated with light, the photosensitive coupler in the non-image area, that is, the area irradiated with light, decomposes and loses its coupling activity.Then, when the original image is removed and the photosensitive material is irradiated with light of wavelength 550 or less, the diazoamino compound is It converts into a diazo compound and couples with the coupler remaining undecomposed in the image area to produce an azo dye, forming a positive image.

The original image with the positive image is superimposed on the above photosensitive material,
Contrary to the above case, when irradiating light with a wavelength of 550 mA or less, the diazoamino compound in the area without an image, that is, the area irradiated with light, changes to a diazo compound,
Coupling with a photosensitive coupler produces an azo dye to form a dye image.

Next, the original image is removed and the photosensitive material is irradiated with light with a wavelength of 650 mm or more. The unreacted coupler remaining in the photosensitive layer without coupling decomposes, loses its coupling activity, and releases the azo dye. It will no longer be generated. In this case, the first imagewise light exposure produces an azo dye, so that an image opposite or inverted to that of the original is formed, resulting in a copy having a positive-negative (or negative-positive) image. The diazoamide/compound used in the present invention is a compound having a group consisting of -N2-N in its molecule, and specific examples thereof are as follows.

By making the photosensitive coupler used in the present invention coexist with a sensitizer that is sensitive to light with a wavelength of 550 mm or more, the photosensitive coupler can be coupled by light with a wavelength of 550 mm or more due to the action of the sensitizer. It loses activity and is represented by the general formula below.

In the above formula, R,, R2 and R5 are hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group, a dialkylamino group, an amino group, R8 and R4 are hydrogen, an alkyl group or an alkoxyl group, R6, R7 is hydrogen or an alkyl group, R8 and R9 are hydrogen, an alkyl group, an alkoxyl group, a dialkylamino group, an amino group or a hydroxyl group, and R, o are hydrogen or COOR, . (R
、． represents hydrogen or an alkyl group having 1 to 4 carbon atoms)
and X and Y represent the same or different halogen or hydrogen.

Specific examples of the coupling component shown in the above-mentioned single-prong type are as follows.

A photosensitizer is added to the photosensitive material of the present invention in order to improve the photosensitivity of the photosensitive coupler or to impart photosensitivity to the photosensitive layer to distinguish color signals such as red, yellow, and blue. It is convenient to use.

Sensitizers for this purpose include xanthene dyes such as eosin and rose bengal, thiazine dyes such as methylene blue, diaminophenylxanthene dyes such as rhodamine B, acidic azo dyes such as bottasil violet, and phenosaffron. Phenazonium dyes such as, thiazole dyes such as setofurapine, etc. are used. Furthermore, an imidazole derivative and/or a pendimidazole derivative may be added as an auxiliary agent in order to promote the texture reaction of the coupler by the sensitizer. The photosensitive material of the present invention is prepared by mixing the above-mentioned diazoamino compound, photosensitive coupler, sensitizer, auxiliary agent, and other additives with water or an organic solvent to prepare a photosensitive layer forming solution, and then applying the photosensitive layer forming solution to a support such as paper or plastic. It is obtained by applying it to the surface of a film and drying it. Examples of the present invention are shown below.

Example 1 A photosensitive layer forming liquid was prepared by mixing the following components.

50 methylene blue 10 imitation penzimidazole 1 multi-soluble polyamide 500 double 9 methanol
40 Yusui
After 10 days, the above photosensitive layer forming liquid was applied to 50k9 high quality paper using a doctor knife and dried to obtain a photosensitive material.

A film with a positive image was superimposed on this photosensitive material, and a 600W tungsten lamp (light with a wavelength of 560 or more) was used to cut out light with a wavelength of 560 or less.
After irradiating for 3 minutes from a distance from the melon, the film was removed and the photosensitive material was irradiated with a 20W ultraviolet lamp for diazo copying (light with a wavelength of 560 m or less), and a blue dye was detected. A copy of the positive with the image was obtained. Example 2 The exact same procedure as in Example 1 was repeated, except that instead of the photosensitive coupler used in Example 1, a positive copy with a red dye image was obtained.

Example 3 A photosensitive layer forming solution was prepared by mixing the following components.

The same procedure as in Example 1 was repeated, except that the above photosensitive layer forming liquid was used instead of the photosensitive layer forming liquid in Example 1, and the irradiation time with the tungsten lamp and ultraviolet lamp was halved. A positive copy was obtained in which a purple dye image was formed in the pink non-image area. Example 4 A photosensitive layer forming solution was prepared by mixing the following components.

9 of 50 methylene blue 92-methyl-imidazole of 30 1 ethyl cellulose 2 methyl ethyl ketone 20 t The above photosensitive layer forming liquid was applied to the surface of a transparent polyester film with a thickness of 50 mm, dried, and the thickness Approximately 5 photosensitive layers were formed.

An opaque original image with a positive image is superimposed on this transparent photosensitive material, and a 600W tungsten lamp is used to pass it through a filter that cuts out light below the peak of wavelength 560.
Irradiate 4 inkstones from a distance of 20 degrees, then remove the original, and use a 20W ultraviolet lamp for diazo copying to irradiate the entire surface for 2 hours to create a purple dye image on the blue non-image area. A copy of the positive that formed was obtained. Example 5 A photosensitive layer forming liquid was prepared by mixing the following components.

50/9 Methylene Blue 10/9 Penzimidazole 1 Taethylhydroxyethylcellulose 1 Tatriethanolamine 5/9 Methyl Ethyl Ketone
50# The above photosensitive layer forming liquid was applied to a parallax paper and dried to obtain a photosensitive material exhibiting a pale blue color.

An original image with a negative image was superimposed on this light-sensitive material, and a 20W ultraviolet lamp for diazo copying was used to irradiate the material with 3-ray beams to obtain a negative-positive copy with a blue dye image. In other words, the diazoamino compound in the area irradiated with light changed to a diazo compound and was coupled with the coupler, but in order to decompose the unreacted coupler, the above copy was heated with a tungsten lamp that cut off light with a wavelength of 560 mr or less. Fixing was carried out by irradiating for 2 minutes. In this way, a copy with a negative-positive stable blue image was obtained. When the photosensitive material of the present invention is used, as mentioned above, only light is used and no heat is used, so the equipment becomes simple and wear and tear on the equipment is reduced. Irradiation is performed twice with light. If you irradiate with light with a wavelength of 550 W or higher and then irradiate with light with a wavelength of 550 W or less, you will get a copy with a positive-positive image. If you reverse the order of the irradiation, you will get a positive-negative image ( or negative positive)
, i.e. a copy of the inverted image.

Claims (1)

[Claims] 1. In a photosensitive material having a photosensitive layer on a support, the photosensitive layer contains as main components a diazoamino compound, a photosensitive coupler, and a sensitizer that is sensitive to light with a wavelength of 550 mμ or more, and A photosensitive material characterized in that an image is formed by a step of irradiating light with a wavelength of 550 mμ or more and light with a wavelength of 550 mμ or less.