New insights on sorting behaviour
Several testing campaigns focused on the sorting stage. RecyClass assessed the sorting behaviour of metallised decorations and examined the rolling behaviour of rigid packaging during sorting processes.
The organisation also introduced a new colour module to the Sorting Evaluation Protocol for PET bottles. The module addresses the management of transparent, clear and light blue PET bottle streams, which are widely used in recycling operations.
Updated recommendations for flexible packaging
In the flexible packaging segment, RecyClass issued recommendations on the use of electron beam treatment for polyethylene films. Testing also confirmed the compatibility of PVB-based inks with both polyethylene and polypropylene films.
Recommendations for printing on transparent films were revised after two years of testing different ink concentrations. The updated RecyClass packaging recyclability guidelines shift the assessment from print coverage to the proportion of ink relative to the total weight of the packaging.
Findings for rigid plastics and PET applications
Further tests examined direct printing on coloured containers in the HDPE, PP and PS recycling streams. Within the PET stream, testing confirmed compatibility of PET closures for bottles.
The research also generated recommendations for sealants used in transparent PET thermoforms. EVA sealants are now classified as compatible with recycling processes, while copolyesters are considered non-compatible under the current guidelines.
Additional testing campaigns planned
RecyClass states that the continuous generation of scientific data remains central to the development of its packaging recyclability guidelines. New testing campaigns began in 2026 and further projects are scheduled during the year.
The organisation encourages companies from across the packaging value chain to participate in these testing programmes in order to support harmonised evaluation methods for plastic packaging recyclability.
