[Jewelry making - Article 00301] - Re: [Orchid] Ultrasonic cleaner

[jesse brennan]

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    Here is an article on  ultrasonic cleaning units . 

    http://www.bluewaveinc.com/reprint.htm

    Cleaning solutions for various materials are listed: 

    For jewelry type metals this confirms my use of  conventional liquid
    automatic dishwashing detergents. You don't need much. Low
    concentrations are best. 

    Cleaners use  20  to 80 KHZ.    40 KHZ  is  typical. 

    Medical diagnostics  work in the Meg Hz range  10- 20 MHZ. Some
    devices (lithotriptors) to break up  kidney stones may be using
    about  30 Mhz pulses. 

    Early units immersed the patient in a tub with an very strong focused
    beam. Curent ones use a gell type fluid without body immersion. These
    are even used on infants. 

    There are also units using a catheter  where the transducer is
    placed directly on the stone to cause it to fracture. 

    Ultrasonic systems replace Xray imaging since they do not utilize
    damaging  ionizing radiation. 

jesse 


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