String Freshness Factors

Discussion in 'Badminton String' started by VeritasC&E, Jan 21, 2019.

  1. VeritasC&E

    VeritasC&E Regular Member

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    For practical reasons I'm planning to have 4-6 rackets strung at once and so I started wondering what are the relative weights of different factors contributing to the freshness of strings, themselves, perhaps, broken down into further factors.

    Here are my guesses, with breakdown:

    / String Freshness

    / / Hours Played (Dominant)

    / / / # deg. Beneath Ideal String Temperature (Dominant)
    / / / Average Hit Distance Away from Sweatspot
    / / / Intensity of Play

    / / Time Since Last Re-String

    / / / Average Air Humidity (Dominant)
    / / / Air Density / Meters Above Sea Level
     
    #1 VeritasC&E, Jan 21, 2019
    Last edited: Jan 21, 2019
  2. VeritasC&E

    VeritasC&E Regular Member

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    Does anyone have a guess as to how much *time_since_last _restring* weights against *hours_played* as to string freshness?

    i.e. would it be ok to string rackets a year in advance and expect them to be as fresh when you start playing with them a year later, just because you haven't played with them?
    Or is there a non-negligible impact on freshness from the string just resting on the racket at a high tension?
     
  3. kwun

    kwun Administrator

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    you can measure the tension loss using the ping frequency.

    we have done measurements long time ago. expect to lose 1 lb after a day sitting around. and then another 1lb or so for the next couple of times the racket get used.

    we never done long term test like week or months.
     
  4. visor

    visor Regular Member

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    There's nothing like fresh bread, fresh coffee, fresh sushi and the same goes for fresh string bed...

    Sent from my SM-G965W using Tapatalk
     
    #4 visor, Jan 24, 2019
    Last edited: Jan 24, 2019
  5. kwun

    kwun Administrator

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    also, fresh string smells as good as fresh.... nevermind... :D
     
    s_mair and visor like this.
  6. VeritasC&E

    VeritasC&E Regular Member

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    Well there's two distinct things:

    Loss of tension: That I have measured over time (at 13-14% after 4 months on NBG99 strung at 30lbs without pre-tretch on ZFII), and after the first week depends almost exclusively on hours played. The tension you can measure by pinging.

    Loss of Freshness: At the same tension the same string can have different repulsion characteristics depending on the initial tension, hours played since strung, and to a lesser extent, time since strung. And that you can't really measure by pinging. But you feel it while playing. I would also include in "loss of freshness" the deterioration of the coating on some strings that normally helps with control by increasing friction. Fresh NBG99 for instance is very shiny due to that coating, after 25 hours played the centermost half portion of the stringbed has lost about 50% of that coating and of the "shine" that comes with it.
     

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