So moisture can’t get a grip.
Anti-fogging agents prevent the formation of condensation drops on plastic film. Condensation drops are undesirable on food packaging because they mar the package imaging and the packaged item is not clearly visible. In greenhouse film they prevent condensation from dripping, which results in brown spots caused by the concentration of light. In anti-fogging agents, special additives are worked into the polymer which migrate to the surface and minimize surface tension.
We are glad to send you further information.