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What problems can arise with ink during adhesive label printing?
2022/06/20
Ai’an Printing
In adhesive label printing, issues such as inadequate ink drying or excessively rapid ink drying frequently arise, which not only degrade print quality but also hinder production efficiency. To address these problems, it is essential to first identify their root causes before devising effective solutions.
In adhesive label printing, issues such as inadequate ink drying or excessively rapid ink drying frequently arise, which not only degrade print quality but also hinder production efficiency. To address these problems, it’s essential to first identify their root causes before devising effective solutions. Let’s explore some key aspects of this printing process.
The ink layer is too thick.
During large‑area printing, excessive ink application and overly thick ink films can lead to a “false dry” condition: the surface layer dries completely while the underlying layer remains incompletely dried. This phenomenon is particularly problematic in subsequent processing steps, as it can cause the surface ink film to flake off. The reason is that the poorly cured underlying ink layer exhibits weak adhesion to the substrate, making it susceptible to abrasion and detachment under frictional forces.
UV lamp power is insufficient.
Insufficient UV lamp power is also one of the causes of poor drying in UV inks, and this is closely related to a company’s daily production operations, primarily manifesting in the following aspects.
Ink exceeds its shelf life or contains excessive additives.
In general, if the ink has exceeded its shelf life, inadequate drying may occur after printing due to the deactivation of the photoinitiators in the ink. Additionally, during printing production, additives such as diluents and viscosity reducers are often incorporated into the ink to enhance its performance.
The rubber roller has too low a density.
In actual production, new equipment is more prone to ink‑drying defects. Upon careful inspection, it was determined that the issue stemmed from a rubber roller with insufficient density, which had absorbed the photoinitiator in the UV ink, thereby causing inadequate ink curing.
Adhesive label,Label printing
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Contact Us
Address: Building 54, Zone E, Longgang New City Entrepreneurship Park, Longgang City, Zhejiang Province
Phone:0577-68678995 0577-68678996
Fax: 0577-68678955
Email:ireant@sina.com
Beijing Company
Address: No. 18, Wushun Road, Huangcun Town, Daxing District, Beijing
Business Phone:010-61261816 010-61261814
Fax: 010-82162755
QQ: 2754113983
QQ: 2803118998
Website:http://aianyw.com/