Plastic thickness must exceed 0.025 mm, and the appearance should be homogeneous, no wrinkles, no stains , no bubbles. Printing on bags must be uniform, clear and with a complete text pattern. Plastic bags used for food must be marked in a conspicuous position with the word food”. This is considered as one step to reduce “white pollution” and introduce bioplastics.”
China Bio news release, March 25, 2014