As early as 2022, the recycled PET industry grappled with yellow flake contamination—particularly "dark yellow flakes" caused by barrier bottles. It was at this critical juncture that DATABEYOND initiated independent R&D of its BARRIER spectral sensor. In July 2025, DATABEYOND further inve...
Yellowing in PET flakes stems from two root causes: suboptimal washing processes and contaminated feedstock.
I. Process-Induced Yellowing
Four key factors drive yellowing during washing: temperature, duration, alkali concentration (pH), and chemical formulation. Operator practices fur...