There is a legend that the first soap was discovered by chance by a Roman slave washing clothes on the bank of river Mount Sapo , where animals and made ​​numerous sacrifices grease residues mixed with wood ash ceremonial fires . When it rains , soapy substance was dragged downhill and ends at the river , where they noticed that clothes washers was cleaner when rubbed with it.Found historical documents that speak of the use of soap in ancient Babylon , and the Hebrews also knew him. The ancient Greeks , Romans and Egyptians used the formula to get the soap product that made up the mixture of water , oil and animal or vegetable waxes , and used both for washing clothes and for medicinal uses.The Roman historian and naturalist Pliny in the first century AD speaks of a soft soap used by the ancient Germans , and hard soap known by the Gauls .A century later, the Roman physician Galen facilitated the properties of soap as a means for effective healing and removal of dirt from the body and clothes.The oldest soap formula dating from about 2250 BC, but based natural soap Olivia Oil as we know it today began to develop in the seventh century in the Italian city of Savona and also in Spain . Six centuries later , in the fifteenth appears Marseille soap made ​​from vegetable fat and bone mixture .The soap industry flourished in the Mediterranean coastal cities , because it is an area rich in oil and lye Olivia naturally.But most soap makers had no idea about what was happening during the process. Now we know, from the science of chemistry that the soap is a salt , or in other words, the result of a chemical reaction between fatty acid and alkali . This reaction is called saponification.Although from then until now has been a long time , which has evolved into the world of natural soap is their appearance and not their main formula .