WS WS Damp WS, Ideal for cheeses and fresh products UNTRIGHTABLE is a WS treated paper (Wet Strength), designed to withstand moisture without being doubled by plastic film. Particularly appreciated by cheese makers for the packaging of fresh cheeses or soft dough, it is also suitable for fishmongers for the protection of slightly damp products. Flexible, resistant and fit in direct food contact, it allows hygienic and breathable packaging, while avoiding maceration of food.