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Photographic Process and Material

IP.com Disclosure Number: IPCOM000098270D
Original Publication Date: 1960-Jul-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Lindquist, RM: AUTHOR

Abstract

A method and composition are provided for producing reverse or negative images on a vesicular material containing, in addition to a nitrogen releasing diazonium compound, a diffusion aiding agent in the form of a volatile modifier which is uniformly dissolved in the film. The modifier has a plasticizing effect on the film so that the rate of diffusion of the decomposing diazonium is accelerated.

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Photographic Process and Material

A method and composition are provided for producing reverse or negative images on a vesicular material containing, in addition to a nitrogen releasing diazonium compound, a diffusion aiding agent in the form of a volatile modifier which is uniformly dissolved in the film. The modifier has a plasticizing effect on the film so that the rate of diffusion of the decomposing diazonium is accelerated.

In use, the film is first exposed to ultraviolet radiation in the image area to generate minute nitrogen bubbles in it and is then heated slightly to cause the nitrogen to diffuse from the material without forming visible bubbles. After thus removing the bubble forming material from the image area, the entire sheet of film is exposed to ultraviolet radiation to generate the nitrogen bubbles in the non-image area. The material is then heated to a higher temperature than before to fix these bubbles in the non-image area. The resultant print is a reverse or negative image with light refractive bubbles in the non-image area and a clear portion in the image area.

A suitable composition may be prepared as follows:

(1) Use a diazo compound consisting of ten milliliters of a

copolymer of 80 parts vinylidene chloride and 20 parts

acrylonitrile.

(2) Use 225 milligrams of p-diazodimethylaniline Zinc chloride

in 5 milliliters of acetonitrile.

(3) Add methylethylketone to make total of 25 milliliters.

(4) Apply the solution to a 3 mil base of a polyes...