Standardized Protocol
Laboratory evaluation serves to determine the share of paper fibre that survives the pulping cycle and subsequent screening stages within a recycling facility. The cepi recyclability method v2 provides a technical procedure for converting plants to assess how specific packaging constructions behave during mass production recovery. Standardisation ensures that results obtained in one site remain comparable to those logged elsewhere by providing a fixed sequence for disintegration, coarse screening, and fine screening.
Material recovery depends on these specific phases to estimate the yield of acceptable paper fibres against rejects.
Operational Assessment
Disintegration occurs through a controlled mixing process where water and packaging samples circulate in a calibrated vessel to simulate paper mill conditions. After this stage, coarse screening separates non-fibre elements such as plastics, foils, or adhesive residues from the fibre slurry. The remaining fraction passes through a fine screen to simulate the cleaning mechanisms found in industrial paper mills.
Researchers weigh the residue collected on screens to calculate the mass balance for each individual component of the packaging assembly. If the mass of the fibre fraction remains above a predetermined threshold, the substrate gains a classification indicative of its compatibility with standard paper recovery equipment. Minor variations in temperature or mixing speed during the procedure influence the final measurement, so technicians strictly follow the specified rotational velocity and water quality parameters throughout each test.
This rigorous control keeps the data points focused on the physical resilience of the fibre matrix rather than the specific equipment variations of a local laboratory.
Performance Threshold
Fibre yield constitutes the primary variable defining the success of a packaging design under current industry reclamation standards. Higher retention rates allow recycling mills to accept various print stocks without requiring significant adjustments to existing de-inking or screening infrastructure. Operators rely on the calculated percentage to predict the viability of complex multi-layer structures and barrier coatings.
A low recovery percentage signals a potential conflict between the material composition and existing mill configurations, which forces changes to the ink coverage or the adhesive choice. The final output of this assessment defines the upper limit of non-fibre content acceptable for standard paper recycling streams.