First hand recognition method. Quality vacuum food preservation bags touch is smooth and pliable and feels stiff dark mostly poor packing of the adhesive products.
Second, recognition method of immersion. Quality food vacuum storage bags in containers holding water will float up, poor quality or substandard tends to sink at the bottom.
Third light identification method. Qualified easily ignited blue flame, poisonous failed preservation it is not easily ignited.
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Jiangsu Sunkey Plastic Packaging Co.,Ltd
ADD:99#, Zhongtong Road, Wuxi City, Jiangsu Province, CHN