A label for a blood pack comprising a microporous plastic film including a matrix of interconnected pores for allowing gas to flow into and out of the blood pack through a labeled area. The pores allow ink to be absorbed at least on an outer surface of the label allowing the label to be printed and/or...http://www.google.fr/patents/US5314421?utm_source=gb-gplus-shareBrevet US5314421 - Blood pack labels and the like
