People once used animal fat to do laundry.

Science & Industry

M ost laundry detergent has ingredients you probably haven't heard of — carboxymethyl cellulose is a common one, ditto linear alkylbenzene sulfonate — but one thing it doesn't contain is animal fat. That hasn't always been the case, however, as people have used fat to do laundry since ancient times. Rendered animal fat has long been present in cleaning products, a practice we only moved past fairly recently. The Mesopotamians were the first known group to produce soap, and did so with plant ashes and animal fat.

Other ingredients in proto-detergent solutions included lye and even urine. A set of 14th-century instructions in A Medieval Home Companion explains, "If there is any spot of oil or other grease, this is the remedy: Take urine and heat it until it is warm, and soak the spot in it for two days. Then, without twisting it, squeeze out the part of the dress with the spot. If the spot is not gone … put it in other urine, beat in ox gall, and do as before." Indeed, laundry was an intensely arduous process in medieval Europe, one that involved literally beating the dirt out of one's clothes, and it was carried out almost exclusively by women. So next time you find yourself dreading laundry day, take solace in the fact that it's infinitely easier than it used to be.

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By the Numbers

Year the first mechanical washing machine was invented

1851

Percentage of people irritated by scented laundry products

30.5%

Did you know?

The first commercial electric washing machine was called Thor.

The Norse god of thunder isn't the only notable Thor. That was also the name of the first commercially produced electric washing machine, which the Hurley Machine Company of Chicago introduced in 1908. The brainchild of inventor Alva J. Fisher, the drum-type washer had a galvanized tub and, per the patent, the "perforated cylinder is rotatably mounted within a tub containing the wash water." The Thor proved successful enough for the company to continue innovating for the next several decades; it even made a hybrid dishwasher-washing machine called the Automagic in the 1940s.