Not all UV curable coatings require a heated flash. The heated flash comes before the final UV cure. The purpose of a heated flash is twofold:
• To allow the coating to level creating a smooth surface
• To remove any carrier solvent present. The carrier solvent can interfere with cure if not completely removed from the coating film.
Coatings that are 100% solids (no carrier solvents) do not necessarily require a heated flash. The heated flash could be used to aid in leveling of the coating, not in removal of solvents.
