(This post was last modified: 07-30-2021, 08:40 PM by John Rose.)
(07-30-2021, 12:53 PM)jmudrick Wrote: I'd be interested in a reference for the degreasing/saturation theory. I don't recall the old studies I read addressing it It makes logical sense, I just wonder how much faster saturation is achieved.Like I said, I have no science for it, other than old ads for shampoo that said you could get your hair "squeaky clean" (whether that was a good thing or not).
Also lithographic printmaking techniques, one of which involved applying a polymer solution to the stone, using xylene to strip out the inked areas (linseed oil based ink), apply a water-soluble etch solution, and then ink up the now-cured polymer. All this in order to end up with a negative image on the stone.
Insects landing in soapy water will drown immediately because the soap breaks down the surface tension at their spiracles.
Now I guess the thing to do is establish whether the hair is softer and easier to shave if it is wetted, but it seems to be a given. I suppose that softening the skin itself has a benefit if it makes it more flexible, allowing the blade edge to go deeper (as if to increase the blade exposure). I've always reasoned that stretching the skin tight would counter that effect, so I tend not to do that.
Oddly enough, wikipedia says this about electric pre-shave lotions:
"In contrast to wet shaving, electric shave lotions are intended to stiffen the whiskers. Stiffening is achieved by dehydrating the follicles using solutions of alcohols and a degreaser such as isopropyl myristate."
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