Can a handheld inkjet printer mark frozen durian packaging? This sample test shows a BENTSAI 6205 using solvent ink to print an alphanumeric code on the outside of a durian pack. The packaging was frozen during testing, but this does not mean the printer can print directly onto frost or ice. Frost must first be wiped off the intended print area.

PTS Technology Sdn Bhd shares this practical example for Malaysian food packers considering coding on flexible packaging. It is a sample-specific demonstration, not a guarantee of performance on every frozen-food pack.

Remove frost before printing

Do not print directly onto frost or ice. Wipe frost off the intended print area and remove any moisture or condensation. Print only when the packaging surface is clean, dry and free of frost. If frost or condensation returns, wipe and dry the area again before printing. The ink must contact the packaging surface, not a layer of frost.

Allow 3–5 seconds for drying before touching the print

For this 6205 solvent-ink application, PTS recommends waiting approximately 3–5 seconds after printing before touching or rubbing the printed area. Wiping immediately after printing can smear or smudge the code. Allowing the ink to dry before handling is an important part of the printing process.

This is a practical starting point, not a guaranteed drying time for every surface. Actual drying time depends on the ink, packaging material, surface condition, temperature and humidity. Confirm that the ink is dry on your actual sample and allow longer if needed before handling, stacking or carrying out a rub test.

Test setup at a glance

• Printer: BENTSAI 6205, used in handheld mode.
• Ink: Solvent ink.
• Sample: Flexible durian packaging, frozen at the time of testing.
• Required surface preparation: Wipe off frost and moisture, and confirm that the print area is dry before printing.
• Printed message: A short alphanumeric sample code.
• Method: Manual printing with a positioning guide, followed by a close-up and a brief finger-rub demonstration.

The exact packaging-film specification, surface temperature and rubbing force were not recorded in the material available for this article. The 3–5-second waiting period above is PTS operational guidance for this application, not a measured drying-time result from the video.

Actual video still: an overview of the tested pack. The image is cropped and rotated for viewing; the printed marks have not been retouched.

What the demonstration shows

The video shows printing on the pack and visible black codes on the packaging surface. A brief finger-rub demonstration is also shown. This provides a useful starting point for discussing ink adhesion and code visibility on this particular sample.

It does not establish long-term freezer durability, waterproof performance or resistance to repeated condensation, abrasion or freeze-thaw cycles. Those conditions need separate testing using the customer's actual packaging and process.

Actual video crop: close-up of the sample code. Detail is limited by the original video resolution.

What to check before printing on frozen-food packaging

• Film and coating: Provide the actual packaging sample. Different films, laminates and surface coatings can produce different adhesion results.
• Surface condition: Remove frost, ice, moisture, condensation and any surface contamination from the intended print position. Do not print until the area is clean and dry.
• Printing stage: Confirm whether coding takes place before freezing or while the pack is already frozen, as in this demonstration. A frozen pack still requires a frost-free, dry print area.
• Handling and storage: Allow approximately 3–5 seconds for the ink to dry, check the actual sample and allow longer if needed before rubbing or stacking. Also evaluate storage temperature and the required storage duration.
• Code readability: Confirm message size, contrast and readability after the intended handling and storage process.

Testing on an external packaging surface does not establish suitability for direct food contact or food-contact compliance.

Discuss a sample test with PTS

If you need batch, date or identification coding for durian or other frozen-food packaging, contact PTS Technology with a packaging sample, the message you want to print, the printing stage and your storage conditions. Printer and ink selection should follow actual-material testing.

Explore the BENTSAI 6205/6210 printer series and our food and beverage coding applications. For another material example, see the BENTSAI 6205 spouted-packaging sample test.