Disse grænser anses for at være overholdt, hvis de regummierede gummiforbindelser ikke overstiger grænsen på 0,35 % Bay protoner som målt og beregnet efter ISO 21461 (Rubber vulcanized — Determination of aromaticity of oil in vulcanized rubber compounds).
These limits are regarded as kept, if the vulcanised rubber compounds do not exceed the limit of 0,35 % Bay protons as measured and calculated by ISO 21461 (Rubber vulcanised — Determination of aromaticity of oil in vulcanised rubber compounds).