A guide to coding on carton packaging

Whether you’re marking expiration dates, batch numbers, barcodes, or other critical product information, the right coding solution ensures compliance, traceability, and consumer trust. In this guide, we’ll explore key aspects of coding on carton packaging, including coding technologies, best practices, and common challenges.

Why coding on carton packaging matters

Coding on carton packaging is more than just an industry requirement - it’s a crucial step in supply chain management, regulatory compliance, and brand protection. Proper coding allows manufacturers to:

• Ensure product authenticity and traceability
• Meet industry and regulatory standards
• Improve operational efficiency
• Enhance consumer safety and trust

Types of coding technologies

There are several technologies available for coding on carton packaging, each with its own advantages and use cases. These include:

Thermal Inkjet (TIJ) Printing

• Ideal for high-resolution printing on porous and non-porous surfaces
• Low maintenance with easy-to-replace cartridges
• Suitable for barcodes, QR codes, and alphanumeric text

Continuous Inkjet (CIJ) Printing

• High-speed, non-contact printing for fast production lines
• Works on various substrates, including coated cartons
• Excellent for date coding and batch numbers

Laser Marking

• Permanent, tamper-proof coding with no consumables
• High precision for small or intricate markings
• Ideal for high-contrast marking on coated cartons

Thermal Transfer Overprinting (TTO)

• Produces high-quality codes on flexible cartons and labels
• Great for variable data printing such as barcodes and dates
• Requires a ribbon for transferring ink onto the substrate

Best practices for effective coding on cartons

To ensure clear, durable, and compliant carton coding, consider the following best practices:

Choose the right technology: Select a coding method based on production speed, carton material, and code durability requirements.

Optimise printer settings: Adjust print resolution, speed, and ink type to achieve the best quality and readability.

Ensure proper surface preparation: Clean and dry carton surfaces before printing to avoid smudging or poor adhesion.

Conduct regular maintenance: Routine inspections and cleaning can prevent downtime and ensure consistent print quality.

Verify code readability: Use verification systems to check barcode and text clarity, ensuring compliance with industry standards.

Common Challenges and How to Overcome Them

Even with the best technology, challenges can arise in coding on carton packaging. Here are some common issues and solutions:

Ink Smudging or Fading: Ensure the correct ink formulation for the carton material and allow sufficient drying time.

Illegible Barcodes: Optimise print contrast and resolution to improve barcode scan ability.

Printer Downtime: Implement preventive maintenance and keep spare parts or consumables on hand.

Misalignment or Poor Code Placement: Use alignment guides and automated coding systems to achieve accurate placement.

Future trends in carton coding

Advancements in coding technology continue to drive efficiency and innovation in carton packaging. Some emerging trends include:

• Smart coding solutions with IoT integration for real-time monitoring and analytics
• Eco-friendly inks and laser coding to reduce environmental impact
• AI-driven quality control to enhance accuracy and reduce waste

Summary

Effective coding on carton packaging is vital for regulatory compliance, product traceability, and consumer confidence. By selecting the right technology, following best practices, and addressing common challenges, manufacturers can ensure high-quality, durable codes that stand the test of time. As technology evolves, staying ahead of industry trends will be key to maintaining efficiency and compliance in packaging operations.

If you’re looking to upgrade your carton coding process, Contact us today to find the best solution for your needs.