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Lithographic Printing Process

IP.com Disclosure Number: IPCOM000098924D
Original Publication Date: 1958-Dec-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bertelsen, BI: AUTHOR

Abstract

Lithographic printing may be practiced utilizing a plate having a latent electrostatic or magnetic image formed thereon. An image-bearing plate is covered with a thin coat of oil. An aqueous solution containing a suspension of image attractable particles which are coated with a detergent is applied over the thin coat of oil. The detergent-coated particles are attracted to the image area of the plate. The action of the detergent on the oil film in the image area renders it removable with the aqueous solution when water washed. The exposed image area of the plate may be wetted with a water base ink in preparation for printing lithographically. The plate may be cobalt-nickel plate such as is used in magnetic recording. Carbonyl iron treated with Tergidol detergent is suspended in an aqueous solution.

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Lithographic Printing Process

Lithographic printing may be practiced utilizing a plate having a latent electrostatic or magnetic image formed thereon. An image-bearing plate is covered with a thin coat of oil. An aqueous solution containing a suspension of image attractable particles which are coated with a detergent is applied over the thin coat of oil. The detergent-coated particles are attracted to the image area of the plate. The action of the detergent on the oil film in the image area renders it removable with the aqueous solution when water washed. The exposed image area of the plate may be wetted with a water base ink in preparation for printing lithographically. The plate may be cobalt-nickel plate such as is used in magnetic recording. Carbonyl iron treated with Tergidol detergent is suspended in an aqueous solution.

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