[Studies on the reaction of plastics with drug solutions. Part 3: The effects of the pigment content and of the colouring techniques (author's transl)].

The effects of the pigment content and of the colouring technique on stress-cracking are demonstrated by the example of the low-density polyethylene Mirathen A 13 EA. A 99% aqueous nikethamide solution was used as the drug solution. The sorption increased as the pigment content increased, which testifies to a relationship between the amount of the medium sorbed and the pharmaceutical ageing.