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Thread: Our coating process

  1. #1
    OptiBoard Novice
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    4

    Our coating process

    I was hoping you could help identify anything we are missing or doing wrong.
    Below I have written a comprehensive list of our current process. I would be more then grateful for any solicited comments or advice.

    Thank you

    Hard Coating:

    1. Let's assume a clean lense enters the potassium hydroxide/ city water bath for 300 seconds @ 50c including sonic.

    2. 300s of city water @ 40c

    3. 300s DI water at 60c with Sonic.

    4. 300s drying (ceramic heating) @ 65c

    5. 300s cooling ( empty tray)

    6. Primer ts-56 from tokuyama @ 11.2c for 20s. ( Lacquer has been stored at -20c for 19 months)

    7. Stage 4. Then stage 5.

    8. Lacquer ts-56 from tokuyama @ 11.2c ( Primer has been stored at -20c for 19 months)

    9. Stage 4.

    10. Out
    ___________________

    Oven (1 memment 110f oven)

    1. From HC straight into Oven after check at 40c holding temp

    2. Degass batch at 60c for 60 mins

    3. Curing @ 115c for 120 mins.

    4. Hold at 40c until ready for AR.
    ___________________
    AR

    Recommend AR process from service provider.
    __________________
    Results

    1. Lens looks good after HC, spectrometer reads primer 0.7 and lacquer 2.9

    2. After AR lens looks good but saltwater test gives a range of 4-2 score in salt water, shock , tape test.

    3. AR coating is unstable, a very high percentage on lenses laminating completely in the following months.

    Looking forward to tweaking this process into a great results.

  2. #2
    OptiBoard Novice
    Join Date
    Jan 2021
    Location
    New Caledonia
    Occupation
    Optical Laboratory Technician
    Posts
    1
    Hello,
    My coating process is the same...
    I have same problem about AR coating which is unstable.
    You find a solution ? thanks a lot

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