Pianotech

  • 1.  B72 juice lifespan

    Registered Piano Technician
    Posted 11-17-2019 19:26
    Hello all,
    After you mix B-72/acetone juice, how long will it last (be effective) when stored in well sealed glass bottles?  Thanks!
    Laura Wright, RPT

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    Laura Wright, RPT
    Ivory Keys Piano Service
    Durango CO
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  • 2.  RE: B72 juice lifespan

    Posted 11-17-2019 22:45
    Depends on how good your jar seals. Acetone is tough to keep from evaporating.  On Ed Sutton's suggestion a while ago, I attached some tape to the side of the jar, and ,marked the level of the liquid, so I could see if it evaporated or not. With a good lid and seal, the level stayed put pretty well, but I went to some trouble to come up with an acetone proof seal in the lid. 

    However, that said, I would strongly suggest you try switching to Everclear or some almost pure Ethanol instead of the acetone, as per Ken Eschete's suggestions. I've ditched all my acetone mixes, and greatly prefer the Ethanol mix. The results are less harsh and more controllable, as the Ethanol allows better penetration during "flashing" of the solvent. The Ethanol time required to see results is, in my experience, and as Ken also said in his class, indistinguishable from the acetone results time. Ken had a Journal article on this a couple of months ago I think.

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    Jim Ialeggio
    grandpianosolutions.com
    Shirley, MA
    978 425-9026
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  • 3.  RE: B72 juice lifespan

    Registered Piano Technician
    Posted 11-17-2019 23:21
    I’ve read that it takes longer to dissolve in ethanol. How long does it actually take?

    Sent from my iPhone




  • 4.  RE: B72 juice lifespan

    Registered Piano Technician
    Posted 11-17-2019 23:23
    I mix and store my juice in medicine bottles. Even after 2 months it's still in there.

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    Willem "Wim" Blees, RPT
    Mililani, HI 96789
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  • 5.  RE: B72 juice lifespan

    Registered Piano Technician
    Posted 11-17-2019 23:31
    I dissolved mine in 99% rubbing alcohol (maybe 91%? I don't remember for sure).  The results were really nice in the piano (a Steinway M). I keep it in glass jars. It's still there after 7 months. I don't think it's evaporated much if at all.

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    Benjamin Sanchez, RPT
    Piano Technician / Artisan
    (805) 315-8050
    www.professional-piano-services.com
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  • 6.  RE: B72 juice lifespan

    Posted 11-17-2019 23:47
    Yeah, I hesitated too on the Ethanol because of the initial dissolve time. It takes a couple of days, so one has to plan ahead. But it stays in the bottles well, so it didn't turn out to be much of an inconvenience.  But the results are definitely worth the Ethanol, in my experience.

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    Jim Ialeggio
    grandpianosolutions.com
    Shirley, MA
    978 425-9026
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  • 7.  RE: B72 juice lifespan

    Posted 11-18-2019 08:45
    BTW, I have good success with  "Klean Strip Green Denatured Alcohol", which is primarily ethanol. Not QUITE as pure as Everclear, but more readily available - I can buy it off the shelf at my local hardware. Important to note that is is a different product from the standard "Klean Strip Denatured Alchohol" product, which has a much higher concentration of methanol and other (less desirable) components. I use it primarily for dissolving shellac into solution for finishing purposes. I try and minimize my use of (and exposure to) acetone.
    Regards, JF

    --
    John Fabel  MS, IDSA
    Innovation, Entrepreneurship and Education 
    for Equity & Sustainability
    > Principal, I / D / S Consulting -- Innovation, Design & Strategy
    > Startup Advisor, FORGE/Greentown Labs
    > Adjunct Assistant Professor,  Dept of Environmental Conservation / BCT
      
    University of Massachusetts/Amherst
    413-695-1380   text
    120 Pulpit Hill Rd.
    Amherst, MA 01002 USA





  • 8.  RE: B72 juice lifespan

    Posted 11-18-2019 08:59
    John, Looks like you're in Massachusetts, as I am.  I get Everclear at the local liquor store, as they allowed it back on liquor store shelves.  Good to know about the Klean Strip Green.

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    Jim Ialeggio
    grandpianosolutions.com
    Shirley, MA
    978 425-9026
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