The RAR was designed by Charles and Ray Eames to be manufactured of metal before being sprayed with neoprene (a synthetic rubber) to make it more comfortable. However, by the time the chair could be manufactured, Herman Miller had developed the technique to build the seat out of polyester bonded with fibreglass strands.
Samuel Yellin was born in the Russian Empire in 1884 to a Jewish family in Mohyliv-Podilskyi, Ukraine. He was apprenticed to a master ironsmith when he was eleven years old. He finished his apprenticeship at the age of sixteen in 1900. He left Ukraine shortly after and travelled across Europe. He arrived in Philadelphia, Pennsylvania, in approximately 1905, where his mother and two sisters had already settled; his brother arrived around the same time. Samuel Yellin began taking classes at the Pennsylvania Museum School of Industrial Art in early 1906. Within a few months, he was teaching there, a job he held until 1919.
Sigurd Persson (1914–2003) was a Swedish sculptor, blacksmith, and professor who is regarded as one of the twentieth century’s most influential Swedish designers. Growing up in a goldsmith family, Persson founded his studio in Stockholm in 1942. Throughout his long career, he crafted objects in various materials ranging from metal to glass to plastic.