I learned that if you squeeze more of the juice from the violets. Mix it with equal amounts of water and let it sit for a day or two. It will turn thicker because of the thick mucilage. It's very nice as this makes it seem way more soapy than other plants I've used. It almost feels like a liquid hand soap from the store. This plant also contains salicylic acid which is good for fungal problems. I find it leaves my skin feeling nice and soft after washing and drying. I can see this being commercialized as a hand soap. If a preservative is added to prevent it from going rancid. The pigment from the flowers could used to add a nice color to it.
I've also learned that Grape Hyacinth with its onion like root can be used a soap. Along with Purple Dead Nettle. Now I know many soapy plants in my area
Yucca, soapwort, chenopodium, chickweed, violets, grape hyacinth and purple dead nettle.