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  1. #18
    Administrator kwun's Avatar
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    someone lend me a scanning electron microscope. please!

  2. #19
    Regular Member visor's Avatar
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    Quote Originally Posted by visor View Post
    wait a minute... so the dye goes right thru to the core?

    and this begs the question: do the different colours of zm62 play the same?

    and if not, which one is best?
    @kwun
    .................

  3. #20
    Administrator kwun's Avatar
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    Quote Originally Posted by visor View Post
    @kwun
    .................
    @visor , you ask tough questions and expect fast answers! Let me find out later today...

  4. #21
    Regular Member gundamzaku's Avatar
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    you have way too much time on your hands...not hating, just jealous

  5. #22
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    nice pictures!

  6. #23
    Administrator kwun's Avatar
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    the difficulty of doing this is multiple fold.

    firstly is to find the right lens. i don't have a fancy $$$ macro lens that can do 2x 3x magnification. so i use a regular len and then put a reverse lens in front. it work to give some pretty nice magnification, but the image quality is only so so. not very sharp IMHO.

    the other factor is the super thin depth of field. most of these pics are already taken at f/22, sometimes f/16. pretty much the widest DoF i can achieve already. and even then, it is very very hard to align the cut surface with the focal plane.

    and then is the cutting of the string itself. these are cut with a very sharp new exacto knife and as you can see the cut surface is still not perfect.

  7. #24
    Moderator cobalt's Avatar
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    You're using the wrong body. Use a Sinar. Simple....

  8. #25
    Regular Member visor's Avatar
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    Quote Originally Posted by kwun View Post
    best one so far. the old hand shakes too much.
    Attachment 137910
    Quote Originally Posted by visor View Post
    wait a minute... so the dye goes right thru to the core?

    and this begs the question: do the different colours of zm62 play the same?

    and if not, which one is best?
    still waiting for your thoughts...

  9. #26
    Administrator kwun's Avatar
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    Quote Originally Posted by visor View Post
    wait a minute... so the dye goes right thru to the core?

    and this begs the question: do the different colours of zm62 play the same?

    and if not, which one is best?
    Quote Originally Posted by visor View Post
    still waiting for your thoughts...
    you know the expression, to split hair ? to take this shot it felt exactly like that, literally and figuratively.

    but i think the hardwork pays off.

    as for your question, i don't know. i have only tried the red version. i will try the white one next time i order.

    Name:  2M6Q0232.jpg
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  10. #27
    Regular Member visor's Avatar
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    Wow kwun, that is an amazing job!

    You're really splitting hairs here.

    So it does look like the core is white/clear.

  11. #28
    Administrator kwun's Avatar
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    and this is the Adidas string. 0.69mm
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  12. #29
    Administrator kwun's Avatar
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    in the ZM62 photo, you can kinda see the outer core weaving like they show in their diagrams.

    the fact that they can weave such tiny fibers is mind boggling.

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  13. #30
    Regular Member visor's Avatar
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    Quote Originally Posted by kwun View Post
    in the ZM62 photo, you can kinda see the outer core weaving like they show in their diagrams.

    the fact that they can weave such tiny fibers is mind boggling.

    Name:  252x100Zymax67Red.png
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    ashaway can do it... because they've been in the twine business for ages, starting with fishing line, surgical sutures, etc...

  14. #31
    Moderator cobalt's Avatar
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    Quote Originally Posted by kwun View Post
    in the ZM62 photo, you can kinda see the outer core weaving like they show in their diagrams.

    the fact that they can weave such tiny fibers is mind boggling.

    Name:  252x100Zymax67Red.png
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    Kwun, that last pic of the Zymax string that you took is very interesting... does it appear that the inner core threads are not as densely packed as we might expect them to be? Could this be a deliberate part of the design, to obtain better power?

    ...and then I look at the Adidas string composition, which appears almost.... disorderly by comparison!

  15. #32
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    @ Kwun : Did someone answered your question about who was doing the strings for Adidas? Those pics might help...

    Great job once again!

  16. #33
    Administrator kwun's Avatar
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    i am 99.9% certain who is their OEM. not sure if i am allowed to say though. but if you look at the coating of the Adidas string photo, they have these wide flat fiber wrapping around (vs. woven filament in the Ashaway). you can try to see who has such flat fiber structure in their string design. AFAIK, only one company do that, and they are Japanese.

  17. #34
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    @ kwun: So when are you going to post pictures of broken Gosen strings?


    (I hope I'm not putting you into trouble? But I like this kind of Badminton riddle)

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