The key ingredient in any melt and pour soap is propylene glycol. As with every other ingredient on the earth, there are no doubt "studies" that have been done, deeming this ingredient as skin "unfriendly". There are just as many articles declaring it's benefits and safety. Regardless, this product is what makes the soap base meltable.
I didn't have enough of said propylene glycol for the recipe I found, but, being the impatient person I am, decided to make it anyway, using the amount of propylene I had, to see how it would work out.
I soon discovered the resultant glitch from not having enough. After the soap was made, it wanted to skin over immediately as soon as I stopped stirring it. Not to be thwarted, I continued on.Into the mold it went.
Giving in yet again to my impatience, I popped the little darling into the freezer until it had sufficiently hardened that I could remove it from the mold.
Doesn't look too bad. Glad the yellow color toned down a bit. Now, to see if it will cut easily and remelt?
Yes! Nice and soft. Cut easily. Now. Will it melt?
Yes! However, can you see the skin on top? THAT is the thorn in my side, but, reminding myself this is an experiment.
I added some color, just for the sake of adding color. Didn't bother with fragrance. That skin is really starting to annoy me!
In the mold and then, yes, you guessed it! Into the freezer. lol
It came out of the mold easily, even tho it was still warm. (I did mention I was impatient, didn't I?)
It lathered good. Hmmm. What's this? My hands felt "sticky" when I was done washing my hands. Too much glycerin? Hmm. Then, a few minutes later, I realized the sticky feeling was gone and in it's place, my hands felt very soft and moisturized; as if I had put lotion on. Hmmm.
All in all, this was a successful project. I learned a lot. I have taken a giant step towards developing the most incredible melt and pour base on the planet. Well, maybe not that good, but really good! I DEMAND perfection. Stay tuned but don't hold your breath! My experimentation must be placed on the back burner for a few days while I work long hours at my day job.