Use as the film of food bag is polyethylene, without noxiousness, the hand is felt have lubricant feeling, the surface is like have candle, combustible, blaze yellow, burn illuminate from time to tome like the tear drippy, have olefin taste. Use as the film of the bag that pack is polyvinyl chloride, often contain noxiousness, cannot use outfit provision, feel is tacky, not combustible, from fire namely extinguish, blaze shows green.

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