Cosmoline: The Lubricant of the Past

Cosmoline is a type of lubricant that was widely used in the past to protect metal surfaces from rust and corrosion. It was also used as a penetrating oil to loosen stuck parts and as a lubricant for machinery. Cosmoline is a mixture of various oils, including mineral oil, paraffin wax, and other additives.

Cosmoline was invented in the early 20th century by the Cosmoline Company, which was founded by two brothers, John and William H. McMullen. The company was based in New York City and produced a variety of lubricants and cleaning products for industrial and commercial use. Cosmoline quickly became popular among manufacturers, mechanics, and other users who needed a reliable and effective lubricant for their machinery.

One of the key features of cosmoline is its ability to penetrate deeply into metal surfaces, where it forms a protective film that helps to prevent rust and corrosion. This made it particularly useful for protecting exposed metal parts on machinery, such as gears, bearings, and other moving components. Cosmoline was also used to lubricate chains, cables, and other mechanical components, as well as to clean and protect surfaces from dirt and grime.

Over time, cosmoline fell out of favor as newer, more effective lubricants were developed. Today, it is largely a relic of the past, although some collectors and restorers of vintage machinery may still use it for its original purpose. Despite its limited use today, cosmoline remains an interesting piece of industrial history and a reminder of the innovative products that were developed in the early 20th century.