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Thermographic Recording Process

IP.com Disclosure Number: IPCOM000098077D
Original Publication Date: 1961-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Peticolas, WL: AUTHOR [+2]

Abstract

Iodine inclusion compounds having the iodine atoms in linear chains and spaced about 3.06 angstrom apart appear bluish black to the eye but transmit infrared radiation. Such complexes include the periodides of benzamide, coumarin, flavones, 7, 8-benzoflavones and the various carbohydrateiodide complexes.

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Thermographic Recording Process

Iodine inclusion compounds having the iodine atoms in linear chains and spaced about 3.06 angstrom apart appear bluish black to the eye but transmit infrared radiation. Such complexes include the periodides of benzamide, coumarin, flavones, 7, 8-benzoflavones and the various carbohydrateiodide complexes.

A white on black image is formed on a three-layer photographic plate comprising: a UV transmitting substrate, such as quartz; a diazo sensitized photosensitive layer; and a layer containing benzamide periodide. To develop a desired image, the diazo-sensitized layer is uniformly exposed to ultraviolet light through the substrate. It is then immediately exposed to image-defining infrared radiation through the benzamide periodide layer to develop refractive image- forming bubbles in the layer containing the diazo compound.

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