Why does the lather in a bar of soap not last to the end of the bar?
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What ever do you mean? I have suds til my soap is gone.
The surface area of the soap bar decreases as the bar wears away, so at the end there's not enough soap dissolving into the water to create the lovely, creamy lather that you got at the start.
Lather is generated by the fast action of rubbing the bar of soap onto a cloth or sponge. The rapid rubbing creates the bubbles.
As the bar of soap becomes smaller and thinner, it is more difficult to control the bar and at the same time rub hard enough to create the bubbles.
Size does matter in this case.
I saw a science show once that explained this...not only does the smaller size make it more difficult to create the lather, but it's something about the TYPE of soap or the fatty acid used to make it- I don't remember all the names, but one of them is myristic. There are all these different fatty acids, and some of them have better lathering ability and "hardiness" than others. I think I recall them saying that the harder the bar of soap, the more lather it will produce. Not sure. I do know that if you put the soap sliver in a sponge it will still lather up nicely!
u know- I never thought of that but u r right!! Thanks for that! I guess it would be b/c the bar is too small?
Because they are making things cheaper and charging more.
It used to be that if you unwrapped your soap and let it stand for a week or so, it would work all the way. Don't know if that still works.
it does if you buy Dove soap
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