Originally Posted by
PRECISIONLAB
First question is material? Next question type of coater? Last question have lenses been exposed to extreme heat?
As far as cure time and coating thickness, Ultra Optics coaters use a timed system for best results. With respect to coating thickness, two actions control this. The amount of time coating is dispensed / applied to backside then spin rpm and duration. UV lamp is also set based on time yielding a cured lens.
With some 1.67 backside crazing can be an issue especially if left in extreme heat. I never backside 1.70 and above as dip coat is the preferred method.