When barcode labels were first introduced they were only available in a paper format. It was quickly found that these labels disintegrated, faded or were otherwise damaged quite easily when in constant use, so a more durable type of barcode label was needed.
Durable barcode labels now feature a type of over-lamination, which provides a coating of a clear polyester material over the label. This over-lamination can then protect the labels from things such as: