- Jan 25, 2020
- Reaction score
- United States
This image is from a batch of soap I made on 27 May, 2020 using the HP.
Why did these moldy spots appear? ... and isn't it odd that the molding happened to only these 3 out of the 10 bars that had been tumbled together in a sealed plastic bag?
The water content was at the rate of 38% of oils. The bars are actually hard and durable. They do not have any purees. I also added a little peppermint oil (at apx 1.5% of oils), along with superfat after the HP cook. In fact, the peppermint is still mildly perceptible in scent and sensation. I thought the mint would have helped to protect, certainly within only 3 months, but clearly not.
This batch has only been for my personal use. A sample soap used to test through washing my hands was tossed back in with the rest after it had dried. Could this have been the culprit, especially since I am in a high humidity environment? Does anyone else ever store soaps badly to see if they can withstand the bad treatment as a type of 'acid test' for undesirable shipping, handling, storage conditions and shelf life? Happy for advise and your stories. Most soaps have remained fine, especially the very hard ones beyond 9 months and 1 year without mold. I figure that the better way to store the soaps would be in a box that is closed but still breathable. Do high humidity storage conditions cause mold to appear? Is this only an error of tossing back in the sample or could it be something else?
These crazy experiments leave me uncertain re the extent to which packaging should have breathable vents.