The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 14, 1995
Filed:
Jun. 29, 1994
Sheau-Hwa Ma, Chadds Ford, PA (US);
Michael W West, Wilmington, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A method for preparing high resolution, negative-working, wash-off relief images, preferably using ink jet printing, comprising the sequential steps of: (a) providing a non-photosensitive layer comprising an acid-containing polymer; (b) applying an ink imagewise to the non-photosensitive layer to produce image areas and unimaged areas, said ink comprising an esterification agent which is capable of reacting with the acid groups in the polymer to form water-insoluble ester groups; (c) drying the non-photosensitive layer to induce or accelerate the esterification reaction between the acid groups and the esterification agent in the imaged areas; and (d) washing the non-photosensitive layer with an aqueous developer solution to remove the unimaged areas of the non-photosensitive layer is described.