Hi friends

i'm kris.(poland)
in my lab i working on ppg vernish 1080. For me is new material. We have scl machine cdc 500. I try to find the best time of lift speed for index 1.5(cr-39) and also for 1.6. And transitions. And maybe someone have a idea how to minimize a "tear" on bifocal lenses.
Reagrds
kris