Poor adhesion of ink for batch details on glossy packaging surfaces.

Poor adhesion of ink for batch details on glossy packaging surfaces.

Published on 28/12/2025

Poor adhesion of ink for batch details on glossy packaging surfaces.

Introduction:

In the pharmaceutical industry, ensuring the accuracy and legibility of batch details on packaging is crucial for compliance and patient safety. However, printing on glossy surfaces presents unique challenges, particularly concerning ink adhesion. These surfaces, often selected for their aesthetic appeal and durability, can pose significant difficulties in maintaining the integrity of printed information. This blog post delves into the issues surrounding poor ink adhesion on glossy packaging and offers actionable solutions to optimize printing processes in pharmaceutical packaging.

Challenges and Issues:

  • Low surface energy of glossy materials leading to poor ink wetting and adhesion.
  • Ink smudging or fading, compromising the legibility of critical batch information.
  • Incompatibility between ink types and packaging substrates.
  • Environmental factors like humidity affecting ink performance.
  • Inadequate curing or drying times for inks on non-porous surfaces.
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Step-by-Step Troubleshooting Guide:

  1. Evaluate Surface Energy: Use a dyne test to measure the surface energy of the packaging material. A higher surface energy generally improves ink adhesion.
  2. Select Appropriate Ink: Choose inks specifically formulated for use on non-porous, glossy surfaces. Consider
UV-curable or solvent-based inks for better adhesion.
  • Surface Treatment: Implement surface treatment techniques such as corona or plasma treatment to increase the surface energy of the packaging material.
  • Optimize Printing Conditions: Adjust printer settings, such as pressure and speed, to ensure optimal ink transfer and adhesion.
  • Control Environmental Conditions: Maintain optimal temperature and humidity levels in the printing area to prevent ink adhesion issues.
  • Ensure Adequate Curing: Verify that curing lamps or heat sources are functioning correctly to ensure inks are fully cured or dried.
  • Regular Quality Checks: Conduct regular quality control checks to monitor print quality and adhesion over time.
  • Consult with Suppliers: Work with ink and substrate suppliers to find compatible materials and inks for your specific application.

    • Regulatory Guidelines:

    Adhering to regulatory guidelines is crucial in pharmaceutical packaging. The USFDA provides comprehensive guidance on packaging and labeling, emphasizing the need for clear, legible, and durable batch information. Compliance with these guidelines not only ensures legal adherence but also enhances patient safety and product traceability. Additionally, international standards such as those from the European Medicines Agency (EMA) and the International Council for Harmonisation (ICH) provide further directives on pharmaceutical packaging requirements.

    Conclusion:

    Ensuring effective ink adhesion on glossy packaging surfaces is a multifaceted challenge that requires a strategic approach encompassing the right choice of materials, inks, and printing techniques. By understanding the root causes of adhesion issues and implementing targeted solutions, pharmaceutical professionals can enhance the quality and compliance of their packaging processes. Regular quality checks and adherence to regulatory guidelines are paramount in maintaining the integrity of printed batch details, ultimately ensuring patient safety and regulatory compliance.

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