Black soap is an all natural laundry stain remover. I was surprised when I read this in the materials from Marius Fabre. Their instructions state that black soap can be used both as a traditional detergent as well as a treatment for tough stains. I decided to put black soap to the test with a stubborn grease stain on a pair of black shorts. I also tried it on a toddler’s fully stained t-shirt.

First up was the toddler t-shirt with several greasy looking stains. I tried spraying a mixture of water and black soap from a bottle (basically the multipurpose spray) on the stains. I left the t-shirt to soak for several hours to overnight and then washed with our regular detergent. The result was faded stains, but they were still there. When looking back at the information from Marius Fabre, it says to apply soft or liquid soap directly to the stain, so I decided to try again.

This time, I tried treating a grease spot on the front of some black shorts. I noticed it when I was folding the shorts straight out of the clean laundry, so they had already been washed. I figured the stain was set, so I slathered a bit of liquid black soap right on the stain and threw the shorts back into the laundry pile. I washed them regularly a day or two later. There is not even a hint of the stain left on the shorts. It is entirely gone.

Since Marius Fabre black soap is vegetable-based and made with olive oil, it’s an all natural and biodegradable soap that can be used with confidence around the home, kids, and pets.