Laser paper off-set printing technology capable of finishing bar code printing at one step

Abstract

The invention discloses a laser paper off-set printing technology capable of finishing bar code printing at one step. The technology comprises the following steps: (1), drafting a plate making file, to be specific, making a bar code bottom white by using three printing plates to carry out overprinting, wherein a white 1 and a white 2 are both solid plates, the code bar part of a white 3 are hollowed, and equal-width ink balance control signal bars for the white 1, the white 2 and the white 3 are made at the positions corresponding to bar codes on the bottoms of products; and (2), carrying outa printing technology: to be specific, after printing the white 1 by the first color unit, carrying out curing drying by using a UV lamp, and printing the white 2 in a wet-on-dry mode by the second color unit; printing the white 3 in a wet-on-wet mode by the third color unit; printing other color sequences which are not overprinted with the white by the fourth color unit; and printing the bar codes black by the fifth color unit. The laser paper off-set printing technology capable of finishing bar code printing at one step, provided by the invention, solves the problems that the detecting gradeof the bar codes cannot reach standard requirements due to the exposure of bottom paper laser luster after the bar codes are printed on laser paper in the prior art. The technology can finish the printing of the bar codes on the laser paper at one step on one off-set printer.

Description

technical field [0001] The invention belongs to the technical field of barcode printing on laser paper, and in particular relates to a barcode printing process completed once by laser paper offset printing. Background technique [0002] Laser paper offset printing packaging printing is a newly developed high-tech environmental protection material. It is widely used in tobacco, wine, medicine and other packaging. The background color (white) of the barcode cannot effectively cover the surface of the laser paper with high reflection and high reflection. Usually, the barcode level cannot meet the national standard requirements. The defect rate of the unqualified detection index accounts for 98%; the unqualified symbol contrast accounts for 5%. The main manifestations are: the white ink printing in the barcode area is not smooth, and the surface of the laser cardboard is not effectively covered, resulting in irregular light transmission points, which is the main reason for the f...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a laser paper offset printing process that completes the barcode printing at one time, so as to solve the problem that the barcode detection level cannot meet the standard requirements due to the incomplete coverage of the background color of the barcode and the exposure of the laser luster of the bottom paper when printing barcodes on laser paper in the prior art and the printing process does not use a single concave machine to pre-prime, and the printing of the laser paper barcode can be completed at one time only on the offset printing machine

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