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Thread: Effects acids and bases/alkalis have on hair.

  1. #41
    Member bjjowett1993's Avatar
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    Default Re: Effects acids and bases/alkalis have on hair.

    Actually, I was going by a site of pH levels, but after checking a science textbook, it states that vinegar has a pH of 2.4 - 3.4. I will edit it. Thank you for your imput.

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  2. #42
    Long-haired longhair danacc's Avatar
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    Default Re: Effects acids and bases/alkalis have on hair.

    Quote Originally Posted by bjjowett1993 View Post
    I knew that saponification was due to the reaction of a base and a fat/oil, but I would think that this wouldn't affect the pH much, as I thought it would neutralize a bit. Is this so?
    No, while fatty acids are used to make it, soap is basic. The saponification process with the hydroxide moves the pH to basic.

    Chemically, detergents can be part of an acidic solution, but adding acid to soap to bring it to neutral or acidic pH will undo its cleansing properties. It won't be soap any more.

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  3. #43
    Member bjjowett1993's Avatar
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    Default Re: Effects acids and bases/alkalis have on hair.

    Oh, ok. Thank you very much.

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  4. #44
    New Member elizza's Avatar
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    Default Re: Effects acids and bases/alkalis have on hair.

    Quote Originally Posted by bjjowett1993 View Post
    The only true way to test your shampoo/conditioner, or anything, is with litmus papers. Thank you for your imput.
    I thought about that recently.

    Wouldn't it make more sense to test at least the shampoo dilluted with some water - to get information of the mixture's ph, just like it would be when applied on the hair?

  5. #45
    Member bjjowett1993's Avatar
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    Default Re: Effects acids and bases/alkalis have on hair.

    Quote Originally Posted by elizza View Post
    I thought about that recently.

    Wouldn't it make more sense to test at least the shampoo dilluted with some water - to get information of the mixture's ph, just like it would be when applied on the hair?
    Good point, but I would believe that finding the base pH, the plain pH of the shampoo itself would be better, as the amount of water each individual person uses is variable. You may choose to do what you wish though, whatever works for yourself. Good point though!

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