[Jewelry making - Article 01110] - Re: [Orchid] Glycerin soap

[Roseann Hanson]

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>       you needn't worry about glycerin soap attracting moisture. You
>     misunderstand the process.  Soap and water are used to wash one's
>     face. The idea is that a bit of glycerin, or any other form of
>     oily lubricant, will help seal in moisture in the pores of skin. 

    Actually folks, you might want to re-think this. 

    I have long been well into my Oil of Olay years (hey, it's for "skin
    over 25" right? gotta believe that advertising...) and am a
    cheapskate so I make my own cosmetic products. 

    Glycerol is a byproduct of traditional soapmaking - the fats and lye
    are combined, and glycerol, which is in fat, is removed (though
    sometimes left in, in higher grade products). Glycerin is the
    commercial marketing name. 

    Here's the important part: Glycerin is hygroscopic -- it draws
    moisture from the atmosphere (leave a dish of pure glycerin out and
    it will eventually become a semi-solution of something like 20%
    water; ever use Neutrogena bar soap? what does it look like after a
    day or two on the dish? beaded with moisture!). So it DOES NOT seal
    in moisture (you can't seal open pores of the skin or you'd have a
    big problem), it attracts moisture, yes, and thus makes your skin
    feel dewy and lovely and not so old and wizened ;'). 

    But then by extension, glycerin on your tools will attract moisture.
    If you use commercial glycerin soaps, then the oil in the soap will
    help counteract the moisture's effects especially on ferrous metals. 

    I don't think the glycerin is needed in the application we are
    talking about -- reducing friction/heat. I think all you are looking
    for is something easy to use to transfer the heat -- pure oil is ucky
    on your workbench, and so liquid soaps are convenient. 

    Unless you want to use the glycerin products so your tools look
    younger too.

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