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Layer Forming Inks for Lift Off Correction

IP.com Disclosure Number: IPCOM000053120D
Original Publication Date: 1981-Sep-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Anderson, CW: AUTHOR [+2]

Abstract

Ink formulations are discussed which form a release layer upon printing to facilitate lift-off correction. The ink layers have a colored and an uncolored phase randomly dispersed while on a ribbon, but the impact, heat, or other characteristics of printing cause the uncolored phase to form a layer between the paper and the marking material.

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Layer Forming Inks for Lift Off Correction

Ink formulations are discussed which form a release layer upon printing to facilitate lift-off correction. The ink layers have a colored and an uncolored phase randomly dispersed while on a ribbon, but the impact, heat, or other characteristics of printing cause the uncolored phase to form a layer between the paper and the marking material.

A mixture of ethylene vinyl acetate copolymer with polyethylene glycol and polyoleate is applied to a supporting substrate, with alcohol-dispersed carbon black as a pigment. Upon being heated from the substrate as a thermal ribbon, the mixture transfers to paper as one phase. Upon cooling, a layer facilitating release by lift-off correction with an adhesive forms between the paper and the colored image.

A mixture of PEQOSPERSE 4000 M. S.* polyglycol esters of fatty acids, ethylene vinyl acetate copolymer, and carbon black forms a printing layer in which the esters are not completely compatible with the resin. Printing heat forces the esters into a separate phase formed between the paper and the colored image. The esters facilitate release of the colored image.

The material which acts as a release agent should have a lower melting point than the other material and be incompatible with the other material at room temperature. To transfer as one phase, the release material should be compatible at the printing conditions. Other such mixtures are polyamide resin with polyoleate, polyamide r...