Browse Prior Art Database

Vapor Distillation of Waxes

IP.com Disclosure Number: IPCOM000092651D
Original Publication Date: 1967-Feb-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Sachs, PG: AUTHOR [+2]

Abstract

Benzophenone and substituted benzophenones, such as 4-methylbenzophenone and 2, 4-dimethylbenzophenone, are useful as dry vaporizable materials in a distillation printing process. In this process, the back of an original document is either coated with a vaporizable material or brought into contact with an intermediate sheet coated with the vaporizable material.

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Vapor Distillation of Waxes

Benzophenone and substituted benzophenones, such as 4- methylbenzophenone and 2, 4-dimethylbenzophenone, are useful as dry vaporizable materials in a distillation printing process. In this process, the back of an original document is either coated with a vaporizable material or brought into contact with an intermediate sheet coated with the vaporizable material.

A copy sheet of plain paper is brought into contact with either the back of the original document or the intermediate sheet. The composite is exposed to infrared radiation. The vaporizable material evaporates in the areas corresponding to the black print areas and condenses on the copy sheet. Subsequently, the latent oil image can be rendered visible by developing the copy sheet with a black powder which adheres to the oil image.

The following results are obtained with the above-named materials:

Molecular Melting Point

Material Weight degree C Results Benzophenone 182.2 48 Very good copies 4-methyl- 196.3 53-56 " " " benzophenone 2,4-dimethyl 210.3 47-49 Excellent copies benzophenone.

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