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 Products\Service\Edging & Finishing\ |
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| Edging & Finishing Recommendations |
1. Edging:
- Polycarbonate can be edged using present CR39 procedures with slight modifications using a dual purpose CR39/poly wheel.
- Coolant will be turned off during the rough-in cycle and half way through the finishing cycle (one rev. dry, second rev. with coolant), if automatic edger with build-in poly lens cutting function.
- Otherwise, the coolant shall be turned off by hand during finishing cycle and turned on coolant at last two rounds of lens beveling to get s shiny edge. Polycarbonate can also be cut dry, therefore, a powerful vacuum is suggested to be used to remove the waste.
- A filter or lady’s sock (as alternative) is suggested to be used underneath edger water tube before drench to the recirculate tank and dispose it frequently.
- Edging machine should be keep in clean. It is suggested to use razor blade or glass lens or chopsticks to edge (clean) the poly powder which were build up on the diamond wheel while edging lens.
2. Beveling:
- A standard wheel may used. Dry beveling is preferable as wet tends to load wheel and slow.
- A razor blade or finger nail can be used to remove the edged chips.
3. Glazing:
- To glaze polycarbonate lenses should eliminate stress to the lens from improper sizing, mounting or excessive tightening of screws. Stress will eventually lead to the crazing or cracking of the lens, usually it can be seen in a few days or weeks after dispensing.
- A fine hairlines radiating inward can be seen due to overly stressed area of lens size or overly tightened screw mount.
- Inspect mounted lenses by using polariscope. Usually the stressed area of the lens will appear bright color such as purple , yellow and rainbow color. Please edge again or loosen the screw until the stress is disappear.
4. Grooving:
- Use standard CR39 grooving machines dry.
- If material is left in the groove, use a sharp pick, toothpick or a razor blade to remove.
5. Drilling:
- Use standard sharp drill machine.
- If the material is left in the hole, use a toothpick to remove.
6. Polishing Edges:
- Use standard CR39 techniques with a buffing wheel and polishing compound (green soil).
- If adjustable, use slow speed on buffing wheel and less pressure than with CR39 to minimize stock removal and heat build-up
- If AR coated lens is applied, use proper tape to protect lens surface.
- It is recommended to polish 1/4 edge each time till finishing.
7. Lens Cleaning:
- Never use Acetone to clean the lens.
- For daily cleaning, brush the dust on the lens surface first, and then clean the lens with the soft cotton or micro fiber cloth. Do not use acetone to clean polycarbonate lens.
- For dirt removal, clean the lens with soap water followed by a clean tap water and dry the lens with a soft cotton or micro fiber cloth.
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Polylite Taiwan Co.,Ltd. All rights Reserved. Copying content is not permitted without authorization.
No. 406, Changfa Rd., Dayuan Dist., Taoyuan City 33759, Taiwan R.O.C. | TEL:+886(3)385-3934 FAX:+886(3)386-3837
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