Medical and pharmaceutical ziplock bags are made from virgin-grade LDPE which is 100% food grade. Both color and clear bags are being used widely in the medical industry. Hospital, clinic, health station, or skin care clinic use these bags to store pills or specimen to be transported and tested.
For a specimen bag, the design is highly specialized. One bag has 2 layers: the first layer is for paperwork, and another layer is for sealing the specimen with easy-to-open tear zone that keeps the specimen free from contamination.