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. 06, 1990
Filed:
Mar. 28, 1989
Akira Nagashima, Shizuoka, JP;
Hiroshi Matsumoto, Shizuoka, JP;
Fuji Photo Film Co., Ltd., Minami-ashigara, JP;
Abstract
A method for making lithographic printing plates which comprises imagewise exposing a presensitized plate for use in making lithographic printing plates to light, then developing and thereafter subjecting the developed plate to burning-in pretreatment, the method characterized in that the burning-in pretreatment is performed after applying, to the developed plate, an aqueous solution containing at least one organic solvent whose solubility in water at 25.degree. C. is not less than 0.5% by weight and whose surface tension measured on 0.5% by weight distilled water solution at 25.degree. C. is not more than 65 dyn/cm. The method can provide lithographic printing plates free of greasing, ink spreading on half-dot image portions, in particular shadow portions and excellent in ink receptivity of image areas. In addition, the method can be automated by making use of a spray-circulation type processing apparatus.