A method of flexographic printing of a tactile ink

By combining offset color printing unit and flexographic printing unit, tactile ink is printed in multiple passes and finished with resin plate and UV gloss varnish, the problems of leveling deviation and ink accumulation in offset flexographic continuous printing are solved, achieving efficient and beautiful tobacco packaging box printing effect.

CN116533663BActive Publication Date: 2026-06-09CHANGSHA ECONOMIC DEVELOPMENT PRINTING TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202310313214.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-28
Publication Date
2026-06-09
Estimated Expiration
2043-03-28

AI Technical Summary

Technical Problem

Existing offset flexographic inline printing inks for tactile printing suffer from issues such as leveling deviation, thin ink layers, and ink buildup, making it difficult to meet the requirements of tobacco packaging boxes for a sense of weight and aesthetics. Furthermore, traditional processes require two sets of equipment and multiple steps, resulting in low production efficiency.

Method used

After the base color is printed using an offset printing press, tactile ink is printed on the paper packaging box in two or more passes using a flexographic printing press to increase the ink thickness to 6~11μm. Combined with the printing of resin plates and UV gloss finishing areas, the printing process is simplified and the adhesion thickness is improved.

Benefits of technology

It simplifies the printing process, improves production efficiency, reduces costs, enhances the tactile feel and aesthetics of packaging boxes, avoids ink buildup, satisfies the requirements for the weight and gloss of tobacco packaging boxes, shortens delivery time, and improves equipment utilization and product quality stability.

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Abstract

A method for inline offset flexographic printing of tactile ink involves using an offset color printing unit to print a base color on the surface of a paper packaging box, followed by two or more flexographic printing steps to print the tactile ink onto the paper packaging box, resulting in a tactile ink thickness of ≥6μm on the packaging box surface. After finishing the paper packaging box using this method, the surface exhibits a matte gloss effect, and a subtle velvety feel can be detected by touch, enhancing the packaging box's aesthetics. Compared to single-pass printing of tactile ink, this invention uses a two-step flexographic printing process, improving the leveling effect of the tactile ink on the paper packaging box surface, increasing the ink thickness, and effectively reducing the accumulation of tactile ink during printing due to increased ink thickness and viscosity. Inline production results in less product deformation, smoother subsequent processes, and improved efficiency and product yield in later stages.
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