Watch cleaning question…

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  • #48501
    tmac1956
    Participant
    • Topics Started: 171
    • Total Posts: 1259

    All:

    Is naptha detrimental to the shellac used to cement-in jewels? I just thought I would ask before I go out on a limb, only to fall off of it.
    Thanks,
    tmac

    #52969
    Bob Tascione
    Moderator
    • Topics Started: 38
    • Total Posts: 1557

    Hi Tmac,
    Naptha is safe for shellac. Denatured alcohol works as a solvent with shellac though. It’s even used as a shellac thinner.

    Enjoy,
    Bob

    #52970
    tmac1956
    Participant
    • Topics Started: 171
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    @Bob Tascione wrote:

    Hi Tmac,
    Naptha is safe for shellac. Denatured alcohol works as a solvent with shellac though. It’s even used as a shellac thinner.

    Enjoy,
    Bob

    Bob:
    Thanks for that information. Using the seven jar method listed in your PDF’s, should I keep the balance and pallet fork out of the denatured alchohol and just use one-dip for those? I am assuming that all other parts are ok in the alchohol…

    Thanks!
    tmac

    #52971
    Bob Tascione
    Moderator
    • Topics Started: 38
    • Total Posts: 1557

    Hi Ttmac,
    Yes that would be best. A quick dip in the alcohol usually isn’t a problem but no reason to tempt fate. If you’re going to use naptha as a cleaner then alcohol rinse won’t really be necessary.

    Bob

    #52972
    tmac1956
    Participant
    • Topics Started: 171
    • Total Posts: 1259

    @Bob Tascione wrote:

    Hi Ttmac,
    Yes that would be best. A quick dip in the alcohol usually isn’t a problem but no reason to tempt fate. If you’re going to use naptha as a cleaner then alcohol rinse won’t really be necessary.

    Bob

    Thanks!
    tmac

    #52973
    david pierce
    Participant
    • Topics Started: 90
    • Total Posts: 1360

    Tmac,
    I use a small inexpensive ultrasonic cleaner that I bought from Harbor Freight a few years ago. I tested different solutions such as detergent and water, windex you name it and finally setteled on straight Naptha. I purchase the Naptha from Home Depot by the gallon. When the cleaner has run through its cycle I pull the parts out and place them on a paper towel to air dry. Although I have not noticed any oily residue on the parts I dip the balance assemblies and hairsprings in laquer thinner just to make sure. I do not put the laquer thinner in the ultrasonic cleaner because I do not want to push my luck.
    I posted the answer to your time standard question as a new thread (Horology 101) because I thought it might be of more general interest to watch students. Boy was I wrong. The English Beer thread outdrew the number of hits 2 to 1. This shows that watch repair students are twice as interested in beer than horology.
    david

    #52974
    tmac1956
    Participant
    • Topics Started: 171
    • Total Posts: 1259

    All:

    When doing manual cleaning, would stringing parts together using aluminum wire cause any problems such as reacting with some of the metals used in the movement?

    Thanks,
    tmac

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tmac1956Watch cleaning question…