AR delaminations

[Mauro.Airoldi]

I'm the coating manager in a european company and i've verify some transitions lens that back from the user (afther 6-9 mounths) with a delamination of the or AR, it is ONLY concave side !!!
The most of the troubles are in stock lenses (prescription only few unit).
The trouble appeare on V model, we sell VI only from 7 mouths.
I've not understand the cause but I coat in same batch Transitions and all the index materials and we haven't the same bad results.
The test the our lens with different quality test (QUVT, TST....) but everithing looks OK and I' not able to reproduce the delamination that I have from the user:hammer:

Can You try to explane me If the transitions layer can influance the adesion on concave ide? (You must remember that during AR deposition we produce a lot of UV) :idea:

[Jim Schafer]

Hello Mauro,
We have a Technical Service Group in Tuam Ireland that takes care of Europe and the Middle East. They are attuned to the hardcoats and processes used in your region.

Paul Lynch and DP Morrin are the two people who can help you.

plynch@transitions.ie and dmorrin@transitions.ie are their contact email addresses.

best regards,
Jim

[Georg Mayer]

Bon Giorno,

only on the concave, say the minus / inner side ???
Very unusual. Which side are you AR coating first ?
Are these Transitions VI and what did Transitions say ?

Ciao

Georg

Better Best then Biggest

[jameselex]

We get coating down by Essilor's company coating lab here, I'd say there is more peeling off with transition than non transition, although it might be within the percentage. It was more at the front.

[Mauro.Airoldi]

Bon Giorno,

only on the concave, say the minus / inner side ???
Very unusual. Which side are you AR coating first ?
Are these Transitions VI and what did Transitions say ?

Ciao

Georg

Better Best then Biggest

I know it is unsual but... it is so.
We coat first CC side
We have more troubles on transitions V but it happen on VI too.
we have a decrease of the reyect lens using a adhesion layer.

[Georg Mayer]

Good morning,

what I note in your original question is the fact that it happens on stock lenses mostly, you say hardly on RX.
Are these stock lenses Hard Coated ex factory or do you apply the Hard Coat yourself on those stock lenses before they go for AR?
My Tr V problems dissapeared as soon as we reverted to wash the lenses after HC and before AR again, are you washing in between?
Yes, an adhesion layer should help to improve the situation.

Georg Mayer

Better Best then Biggest

[Mauro.Airoldi]

we buy the lenses jet hard coat, we clean it firt with a pre cleaning by hands, second in a Ultrasonic plant.
The

[Mauro.Airoldi]

sorry it start...
The clean and coat AR severals different leses (CR39 HC, 1.6 HC, Poly HC... stock and from 1.49 to 1.74 prescriptions) and we have very good result, the quality test are performed differnt times week (thermal shock, QUVT....), lenses back from market are verify one by one and we have less of 0.5% of AR troubles in all the lens tipe, but in Transitions we have 1.5-2%.... we coat it with the same plant and process of the other lenses, the internal quality test give me the same good results but the field give me 3-4 time reject lenses.... and it is CC delemination.