PET laser marking for bottles and packaging

PET laser marking enables manufacturers to apply batch codes, dates, product references and traceability data directly to bottles, trays and selected PET packaging. The process creates a clean, non-contact code without applying ink or labels to the coding area.

At Macsa id, we assess the PET grade, colour, surface finish, wall thickness, code content and line speed. We then validate contrast and readability on your actual pack before specifying a solution.

Laser coding for PET bottles and packaging

PET is widely used in food, beverage, personal care and household product packaging. Depending on the grade and format, laser coding can support:

• Batch, lot and production codes.
• Best-before and use-by dates.
• Product references and serialised data.
• QR codes, Data Matrix codes and other 2D symbols.
• Logos and product identification.

Applications can include transparent or coloured PET bottles, rigid containers, crystalline PET (CPET) trays and selected PET packaging components. For GS1-based codes, the symbol design and print quality should always match the relevant GS1 standards.

Laser technologies for PET marking

CO₂ laser coding for transparent PET bottles

CO₂ laser technology is often suitable for coding transparent PET bottles. The wavelength, optics, power and code design must match the bottle format and required line speed. This helps achieve a clear code while controlling the surface effect.

Explore our CO₂ laser marking machines.

UV, green and fibre lasers for selected PET formats

Coloured, opaque, coated or printed PET can react differently to laser energy. Therefore, UV, green or fibre laser technology may provide a better solution where the required contrast or appearance needs closer control.

A sample test confirms which technology best suits the final material and code requirement. See our UV laser marking machines and packaging laser coding solutions.

What affects PET marking quality?

Several factors influence the final result:

• PET grade and recycled content.
• Colour, additives and masterbatch.
• Bottle shape, curvature and wall thickness.
• Surface finish, coatings, sleeves or printed areas.
• Required code size, contrast and verification method.
• Production speed and available integration space.

For this reason, one laser setting does not suit every PET application.

Benefits of PET laser marking

Direct variable-data coding

Laser systems can mark batch numbers, dates, references and traceability data directly on the pack. As a result, manufacturers avoid applying ink or labels to the coding area.

Consistent code quality

A code must be readable, not simply visible. Macsa id helps define the code size, position and contrast required for reliable scanning and quality control.

Integration for packaging lines

Our systems can integrate into bottle handling, filling and packaging lines. They can also work within a wider coding solution when laser is not the best option for a specific pack.

Validate your PET coding application

Each PET format responds differently. Send us a sample of your pack, the required code and your production conditions. We will assess contrast, readability, pack integrity and integration before recommending the most suitable solution.