Browse Prior Art Database

Pretreatment of the Original to Enhance the Quality of an Image

IP.com Disclosure Number: IPCOM000092965D
Original Publication Date: 1967-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Stryker, FJ: AUTHOR [+2]

Abstract

A copying process is known in which the original to be copied is coated with a material, which is readily absorbed in the background areas of the original, but to a much lesser degree in the printed areas. This results in a differential absorption between the image and nonimage areas and can be utilized for the production of latent oil images. Thus, in the next step of the process, the oil remaining on the printed areas is transferred by an element, such as a roller, to a copy paper. The oil image on the copy paper is then rendered visible by applying toner particles.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Pretreatment of the Original to Enhance the Quality of an Image

A copying process is known in which the original to be copied is coated with a material, which is readily absorbed in the background areas of the original, but to a much lesser degree in the printed areas. This results in a differential absorption between the image and nonimage areas and can be utilized for the production of latent oil images. Thus, in the next step of the process, the oil remaining on the printed areas is transferred by an element, such as a roller, to a copy paper. The oil image on the copy paper is then rendered visible by applying toner particles.

Originals, which do not work or which work poorly in the above differential absorption process, can be pretreated so as to be suitable for use in this process. Primarily, the pretreatment increases the absorption of the oil in the nonimage areas. An example of a pretreatment solution is as follows: POLY-TERGENT* G 200 wetting agent 10 g

Glycerol 10 g

Alcohol 80 g. *Trademark of Olin Mathieson Chemical Corporation.

1