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  1. IB66 is offline
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    #1

    Double Fish Quji High Bounce

    Thought I’d try out a different Chinese Tacky Rubber (CTR), and decided on Double Fish Quji High Bounce.
    This is a tacky rubber, which is is marketed as having patented technology “Osmose Inverse”
    This tech is supposed to maintain the stickiness / tackiness of the top sheet, replenishing the tackiness from within the top sheet!!!!

    Packaging was good, outer was standard fair, sheet was vacuum sealed, once this was removed the top sheet had a thin plastic protective sheet as well, similar to those found on DHS rubbers.
    Once removed from the vacuum pack there was a fairly strong aroma given off and both sheets curled up on 2 opposite sides, (in the vacuum pack the sheets laid flat). This suggests that there has been some form of factory tuning, although it could be a characteristic of the Osmose Inverse technology???

    sponge is blue, dense small pores, hardness - 37 to 39 degrees, 2.1mm.
    Top sheet feels reasonably tacky. Tackiness test - ball was held for a couple of seconds or so.
    Bounce test - 3 bounces then held on top sheet.
    Definitely not ‘high bounce’ !!!
    Glued onto a Primorac all wood clone. No boosting.
    This rubber unboosted, is one of the hardest feeling and dead CTR’s that I have tried!!! (Compared to DHS 8-80, Tau2 and std H3 etc)
    The marketing blurb mentioning ‘high bounce’ seems somewhat misleading!!! this leads me to think that the aroma on opening the vacuum pack is related to the Osmose Inverse tech, rather than boosting to soften up and speed up the sponge. ????

    This is a brief ‘1st impressions’ review.
    I used the set up for a couple of games and for some serve practice. Rubber was mounted on BH & FH.
    This rubber was quite spin sensitive compared to H8-80/Tau2 and required a lot of adjustment.
    During the games much more effort was required to get the ball moving!! Generally a slow rubber.
    Once enough effort was put in, loops were pretty good, good spin, nice forward kick, low throw.
    Good spin when serving.
    Pushing and short game was good, controlling incoming spin was an issue to start with, especially side spin, I needed to adjust bat angles more than usual in order to keep the ball in play. Of course the control is down to me not the rubber!!
    Blocking was fine.

    Personally I think this rubber is crying out for some boosting, to soften up the sponge and feel !!!!!
    If you are playing with un-boosted hard dead CTR’s then I still think this rubber will feel harder!! It reminds me of a sheet of un-boosted H3 Nat 40 degree blue sponge I tried a couple of years ago!! Just a little harder feeling!!!!

    Anyway the rubbers will be removed, cleaned and boosted over the weekend, not sure if this will work well considering there has been some sort of tuning going on at the factory. I’ll try Falco long term on one sheet and Haifu on the other.

    Even though I didn’t really like the feel of this rubber it definitely has potential. I think that if used solely for a couple of months plus, it could really perform well.
    Boosting isn’t really my thing, generally can’t be bothered with the process, but it would be unfair not to try boosting this rubber!! If the boosting works well, then I think this rubber could be a bit of a ‘dark horse’ and possibly a good alternative to the H3’s.







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  2. gekogark1212 is offline
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    #2
    Which version did you get? I think there are three: black, red, and blue packaging. And (from what I can tell) the difference is sponge hardness and not pip geometry but I could be wrong.

  3. igorponger is online now
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    #3

    p

    RUBBER MAKER ANSWERS YOUR QUESTIONS

    Rubber Maker


    -- People, take it from me. The allegedly existing "OSMOSE" is a pure fib. Aromatic nitro-amines did all the job.

    A) DF is now using some smelly additives to the top sheet, following the Dr. Fisher's patented formula from 1934.. It is known as "admixing nitro-amines into raw rubber paste", and those liquid chemicals do produce pronounced smell of rotten fish. No "osmose"is involved in manufacturing this rubber.
    Last edited by igorponger; 08-07-2021 at 01:44 PM.

  4. IB66 is offline
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    #4
    Definitely NOT rotten fish smell, different from some other rubbers I’ve come across!!!

  5. IB66 is offline
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    Senior TTD Member 892 469
    #5
    Quote Originally Posted by igorponger

    p

    RUBBER MAKER ANSWERS YOUR QUESTIONS

    Rubber Maker



    A) DF is now using some smelly additives to the top sheet, following the Dr. Fisher's patented formula from 1934.. It is known as "admixing nitro-amines into raw rubber paste", and those liquid chemicals do produce pronounced smell of rotten fish. No "osmose"is involved in manufacturing this rubber.
    Probably right about the admix being in the rubber because the sheets had curled in the opposite way to when booster is applied, ie with booster sponge domes upwards, out of the pack these sheets curled rubber upwards.
    After 1st coat of booster the rubbers are now laying flat. No curled edges.

  6. IB66 is offline
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    #6
    Quote Originally Posted by gekogark1212
    Which version did you get? I think there are three: black, red, and blue packaging. And (from what I can tell) the difference is sponge hardness and not pip geometry but I could be wrong

    Photo on its way!!

  7. IB66 is offline
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    #7

    Check bottom left corner.
    Can just make out -
    Thickness - 39-41 degrees
    Hardness - 2.1 - 2.15mm !!!!
    Apologies for poor quality of photo.

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