White Residue on Cable Jackets at Paper mills

[wilber]

I am trying to research a test for ozone resistance. There is apparently a history of a white film forming on plastic jackets of cables exposure to ozone and sunlight at the same time. This is said to occur at Pulp and Paper mills. Does anyone have any experience with this? I would like to know what the white film actually is. Is it more prone to form on one type of jacket than another?