Fragrance question

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imanimani36912

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Hello All,

I have a burning question that I can't find the answer to anywhere else so I'm asking here. I've noticed that melt and pour soap retains scent and color better than cold process soap in most cases.

Why?

It can't be because of heat since you can make soap at room temperature and melt and pour melts at 120 degrees.

Is it due to an extra ingredient in melt and pour? If so, which ingredient?

I don't think it's pH since the pH of melt and pour and the pH of cold process soap are very close, if not the same in some cases.

I would greatly appreciate any responses :).
 

Megan

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It's because it doesn't go through the saponification process. Meaning, the lye actively breaks down some of the fragrance. There is no free lye in MP.

Hot process is similar in terms of how much scent you use to MP from what I've heard.

Edit: I'm also from NEO!
 

yolk

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I don't know about color retention in MP soap, but I think scent retention has something to do with the propylene glycol in the bases. That's my guess from the little I know.
 

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