Table 2: Results of the optical measurement of the oxygen barrier.

Trial OTR whey coating 100 whey coating (cm³ (STP) m−2 d−1 bar−1) (cm³ (STP) m−2 d−1 bar−1) (cm³ (STP) m−2 d−1 bar−1) PET 101 — — PET/whey coating/PE 3.1 3.2 0.4