Originally Posted by
SemperFi
I think most of us purchase a product with optimism: An optimism that product X will fulfill wants or needs we have. Or to put that differently, I don’t think any of us buys a soap or cream with the hope that it will suck—i.e., we want the products we buy to work for us.
Richard’s (evnpar) and Jerry’s (Gasman) posts, along with several other similar SRP posts, coupled with a multitude of posts on other forums, about LPL vegetal soaps were interesting.
What was interesting about many of those posts were the wide range of reported experiences: A common trend I read was either the soap worked extremely well or the soap did not work extremely well. The common frequencies of both reported experiences indicate the probability of both observations being valid, and to brush off so many common but polar differences with a YMMV is in this instance, I think, superficial.
After doing deep dive into soap making, I believe LPL is a cold-processed soap. Generally, cold-processed soaps need about 4 to 6 weeks to cure. While most or all the lye in a cold-pressed soap dissipates in about 24 to 48 hours (tongue testing a soap is a common method used in determining whether or not lye is still present), the 4 to 6 week curing time allows saponification to complete and usually yields a better soap as water in the soap finishes evaporating.
A few examples of common issues with cold-processed soaps that haven’t completely cured are they tend to not lather as well, can cause skin irritation (incomplete saponification), and the soap is consumed faster. If variables such as water quality (hard water for example) are thrown into that mix, some issues with incompletely cured soaps can compound.
I think allowing LPL’s veg soaps to cure longer might be a possible solution to some of the challenges some have experienced with these soaps. Indeed, LPL’s website tacitly points to allowing for more curing time with its recommendation, “Our tip: to preserve your soap all its qualities we recommend you leave it open permanently, it will dry, become harder and more economic and pleasant fragrance perfume your bath.”
I especially like LPL’s apricot scent, so I’m going to let it cure for a month plus to see if that improves my experience with the soap. I’ll periodically weigh the soap: If its weight drops and then stabilizes during that time, that will be an indication the soap probably didn’t fully cure before it was packaged into its tin and distributed for sale. Hopefully this experiment will yield great results—will post the results in a month or so. :)