Method for production of photosensitive material for diffusion transfer process

• US 5,049,475 A
• Filed: 11/17/1989
• Issued: 09/17/1991
• Est. Priority Date: 06/16/1989
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Paper Mills Limited
• Original Assignee: Mitsubishi Paper Mills Limited
• Inventors: Baba, Susumu, Yoshida, Akio, Tsubai, Yasuo
• Primary Examiner(s): Schilling, Richard L.
• Application Number:
  US07/437,632
• Time in Patent Office: 669 Days
• Field of Search: 430/204, 430/206, 430/227, 430/230, 430/244, 430/249, 430/234
• US Class Current: 430/249
• CPC Class Codes: G03C 1/775 the base being of paper
• CPC Class Codes: G03C 8/06 Silver salt diffusion transfer

Abstract

A photosensitive material for diffusion transfer process is disclosed according to which characteristic such as high maximum density, high contrast and image reproducibility can be stably obtained. This photosensitive material comprises a support and, provided thereon, a silver halide emulsion layer and a hydrophilic colloid layer and which is processed in contact with an image receiving material in a processing solution for silver complex diffusion transfer process wherein at least one of the silver halide emulsion layer and the hydrophillic colloid layer permeable to water contains a hydroxybenzene developing agent; when the layers on the emulsion layer coated side are immersed in a 0.1N aqueous sodium hydroxide solution at 20° C. for 1 minute, amount of solution absorbed in the layers is 3.5-7.0 ml per 1 g of hydrophilic colloid; and the support comprises a paper coated with polyolefin resin on both sides and has a water content of 5.5%-7.5%.

Claims

1. A silver complex diffusion transfer process for producing images which comprises imagewise exposure to light of a photosensitive material comprising a polyolefin resin coated paper having a water content of 5.5 to 7.5% and provided thereon a water permeable silver halide emulsion layer and a water permeable hydrophilic colloid, layer, wherein at least one of the silver halide emulsion layer and the hydrophilic colloid layer contains a hydroxybenzene developing agent;

when the layers on the emulsion layer coated side are immersed in a 0.1N aqueous sodium hydroxide solution at 20°

C. for 1 minute, amount of solution absorbed in the layers is 3.5-7.0 ml per 1 g of hydrophilic colloid and developing the exposed material with a processing solution in the presence of a developing agent and a solvent for the silver halide to form a soluble silver complex, and transferring the thus produced imagewise silver complex to an image receiving layer containing physical development nuclei of positive material to form a silver image.

2. The silver complex diffusion transfer process according to claim 1, wherein the photosensitive material has an antihalation undercoat layer between the support and the silver halide emulsion layer.

3. The silver complex diffusion transfer process according to claim 1, wherein the total amount of hydrophilic colloid in the layers on the emulsion layer side is 5-8 g/m².

4. The silver complex diffusion transfer process according to claim 2, wherein the developing agent is contained in the undercoat layer.

5. The silver complex diffusion transfer process according to claim 1, wherein the layers contain at least one hardener.

6. The silver complex diffusion transfer process according to claim 1, wherein the polyolefin resin coated on the paper is polyethylene.

7. The silver complex diffusion transfer process according to claim 2, wherein the emulsion layer and the undercoat layer have a pH of 4.5 or less.