For use in the washing machine, cut the cube into 4 or 5 parts and insert 2 or 3 parts into the basket in the middle of the laundry as needed. The laundry will smell of an antique clean, of which the memory !!! The soap is completely natural and biodegradable. MARIUS FABRE In the past our grandparents always used BLACK SOAP, Marseille CUBES and SOAP FLAKES to wash clothes and animals. Marius Fabre is proud to have handed down the tradition of production from generation to generation. MARIUS FABRE BETWEEN TRADITION AND INNOVATION For more than a hundred years the same family has been running a soap factory whose trademark is the production of TRUE SOAP in traditional boilers using original artisan methods. The company has always been located in Salon de Provence in the heart of Provence.