RFF has >=94% of renewable carbon content, certified according to ASTM D6866
Renewable carbon originates from alternative non-fossil sources like biomass or CO₂ and circulates between the atmosphere and biosphere. It contains a well-characterized amount of C14 isotopes that enable differentiation from fossil carbon materials by radiocarbon analysis. ASTM D6866 quantifies the biobased content relative to the material’s total organic content and does not consider the inorganic carbon and other non-carbon-containing substances present. UPM’s Renewable Functional Fillers are “DIN-tested” and certified to belong to the highest biobased material class. Their renewable carbon contents, according to ASTM D6866, are greater or equal to 94%.