Coding Plastic Fruit and Vegetable Crates: Why Choose KGK Inkjet

The fruit and vegetable sector demands high-speed production, rigorous hygiene standards, and impeccable food traceability. Every day, thousands of plastic crates—ranging from single-use PP/PE containers to reusable plastic crates (RPCs)—travel from the field to large-scale retail outlets.

Ensuring that barcodes, production batches, and expiration dates remain perfectly legible on these surfaces is a complex challenge.

The solution lies in the precision of Japanese industrial technology: KGK’s Continuous Inkjet (CIJ) coding systems. In this article, we explore how to optimize plastic crate marking in the produce industry and why KGK technology eliminates machine downtime.

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Challenges of industrial marking in the fruit and vegetable sector

Coding in the fruit and vegetable sector must overcome significant environmental and surface-related obstacles that often compromise standard industrial markers:

• Non-porous surfaces: The plastic used for the crates (PP, PE, HDPE) repels standard inks and may have residues of mold-release agents.
• Extreme environmental conditions: Packaging lines characterized by high humidity, low cold-storage temperatures, and significant levels of dust or organic residues.
• Industrial washing cycles: Reusable crates undergo high-temperature washing with harsh detergents. The code must withstand the supply chain process but must also be removable before reuse.

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The advantages of Japanese KGK inkjet markers

KGK is synonymous with high-precision Japanese engineering. Applied to industrial marking, this technology offers tangible benefits for fruit and vegetable producers and packers.

1. High-adhesion, fast-drying inks

KGK develops its own industrial inks in-house. Specific formulations (both MEK- and ethanol-based) are available for plastic crates, ensuring near-instant drying (under 2 seconds). The code does not smudge and withstands condensation in cold storage as well as mechanical abrasion during pallet transport.

2. Clean Head technology (self-cleaning printhead)

Cardboard dust and dirt residues are the number one enemy of inkjet marking systems. The KGK printhead features a patented automatic cleaning and hermetic nozzle-sealing system. This prevents ink from drying out during production breaks, eliminating downtime at the start of a shift.

3. Reduction in consumption and sustainability

KGK CIJ systems are distinguished by their low solvent (make-up) consumption. This factor offers two advantages:

• An extremely low cost per individual mark.
• Lower VOC (Volatile Organic Compound) emissions, in line with the sustainability requirements of large-scale retail.

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4. IP65 protection rating against water and dust

The stainless steel housing of KGK markers is completely sealed. This allows the systems to operate reliably in humid environments and withstand high-pressure washdowns on packaging lines.

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Traceability and Industry 4.0 Integration in the Fruit and Vegetable Sector

KGK markers integrate natively with enterprise management software (ERP), MES systems, and vision systems for quality control. They enable seamless, high-speed printing of:

• Barcodes and Data Matrix QR codes for logistics traceability.
• Logos and symbols for the brand or for quality certifications (e.g., Organic, PGI).
• Automated variable data (production batch, packaging date, operator code).

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Conclusions: Efficiency for the fruit and vegetable supply chain

Choosing KGK inkjet coding for plastic crates means investing in the operational continuity of the production line. Japanese precision eliminates waste caused by unreadable codes, protects the brand against traceability-related penalties, and ensures full compliance with European regulations.