Four types of drying phenomena exist: Dry to Touch - (sometimes called dry to eye or visual dryness) Time when film feels or appears dry. Tack Free Time - Time when dry materials, such as dust or tissue, cannot be made to adhere to the surface even when pressure is applied. Recoat Time- Time when additional coat can be applied to previous coat without bad effects such as whitening. Full Cure Time - Time when physical properties of film are fully developed and, therefore, cease to change.