What is the heat resistance of translucent imaging film (TIF)? TIF is designed to handle the quick heat exposure in a toner-based plain-paper copier/laser printer. Its coatings are designed to be used in environments up to 85C/185F. At higher temperatures, the printable surface could yellow, or lose some of its toner adhesion properties. When TIF softens, it begins to lose its orientation; it will become wavy and shrink.