Alternate environmental wetting and drying cycles provide the moisture for phosphoric-acid formation. Pretreatment involves alternate wetting and drying of the seed. To create tension, scraping is alternated with wetting and drying. Complications can be prevented by use of wetting and lubricating drops and ointments. Solutions usually also contain additives such as wetting agents and corrosion inhibitors. Due to hysteresis, different wetting and drying curves may be distinguished. It also exhibits properties like zero moisture absorption and non wetting. Such surfaces have varied effects on the contact angles of wetting liquids. Freeze-thaw cycles and cycles of wetting and drying also fragment dead material. This imparts controllable wetting and good interfacial properties. The most frequent activities were wearing diapers, wetting, and using other baby items. This effect can be useful in treating bed wetting and loss of bladder control. Platinum is used because the glass melt has a natural affinity for wetting it. This is known as the Cassie impregnating wetting regime. The usual temperature of achieving flowing and wetting is between .