In-House Scratchguard

[Virginia]

Does anyone have anything (good or bad) about in-house scratchguard coatings?

Baking vs. dipping?

Thanks for input. :cool:

[Jeff Trail]

Depends on your product...are you going to be doing a lot of poly as well? or mostly CR39/High Index stuff ?

Jeff "coating poly is a pain" T.

[rjallison]

Nu-chem has a UV/scratchcoat that seems to work okay. You basically dip it for a few minutes. It must do something because dry erase markers won't write on them anymore which would lead me to believe that it is a hyrdophobic coating.
Rodney

[Maria]

we don't coat polycarb lenses with a hardcoat, as they're supposed to already be scratch resistant. So, are they, or not?

[Jeff Trail]

Maria,

All polys come coated.. but if you are sufacing it then you need to back side coat it again :) ..99% of all PAL's, high index come with a front surface factory coating.. but it's the backside coating if they are surfaced is what needs to be applied..if you had a poly with only the front surface coated and the backside not coated.. you would be able to tell pretty quickly, if you ran it under tap water it would scratch!! :rolleyes: poly maybe impact resistant but as for surface abrasion..boy does an uncoated poly surface scratch easy..
Oh and that UV/RLX (scratch coat) combo ?.. you should NOT use that if the lens is going to get an anti-reflective coating :)

Jeff "grind'em if ya got'em" Trail