Acetate eyeglasses frames

One common problem with pastinous backbones Acetate is to "gather" and pushing the lens out of the flange at the top and bottom of the frame.

This problem occurs especially in elongated shapes with thin paste up and down, particularly the negative lenses.

The initial construction may be good, but after time this problem occurs. It is mainly due to the skeleton because the material in the same time shrink and result in pushing the lens.

We will talk firstly about the correct way to mount such structures, so as to avoid problems and secondly to restore, as far as possible, a structure that exhibits this problem.

After having cut the lens in a desired shape and size, grind additionally in handwheel temporal side of the lens, carefully so as to give an "air" will absorb the future "bunching" of the backbone. It is understood that grinds so little that does not markedly change the shape, do not let "window" of course not influence the centers of kataskefis.Milontas minutes, two or three passages in the hand wheel is enough.

If we have in our hands a skeleton with this problem will observe the lens have kourmparei and pops out and the shoulder have opened behind the lens in the same place. (To restore the structure follow these steps:

  • Remove carefully the lenses even more carefully, heating it to the lowest temperature in the heater, restore their original curvature.
  • Heat well the frame and give the correct flanges slope and shape, as far as possible.
  • Testing the lens, we see that now is much higher.
  • whet the hand wheel as needed, especially temporal, and then assemble the lenses. The end result will be a skeleton with right application and a satisfied customer.
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