Are manufacturers not aging their sheets of zyl properly?
Lately I find that many of my frames (from absolutely top-of-the-line European mfgrs) have shrunk. The way I know this is that I remove the demo lenses when I put the frame on the shelf. Then, when I sell it, I put the demo lenses back in so the lab will trace them instead of tracing the eyewire, which I think is less accurate for shape. Sometimes I can hardly get the demo lenses back into the frame.
Is anyone else having this problem?
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