Under cold storage there was no change in weight till 8th day in LDPE and PP stored samples. The PLW was 3.02(±0.81), 1.96(±0.54), 4.16(±0.58) and 3.74(±0.86)% in LDPE, PP, LDPE with pin holes and PP with pinholes packs, respectively at the end of 28th days of storage.