From the morning hours on September 14, 1960, a mass of people stormed the newly opened glass pavilion on the Square of the October Revolution, the center of the working-class neighborhood Trešnjevka in Zagreb. Unlike the historical event that the square was named after, the revolution in question was of a different kind—the opening of the first self-service department store in the Croatian capital after the Second World War. The opening of the store was one of the events that kickstarted the spread of department stores based on the self-service system in large Yugoslav urban centers.
Usually we wouldn't recommend just casually searching the internet at work for things like "wife discovers the spice of life". But, as it turns out, it's just bread and cellophane.
This undated advertisement from DuPont promoted the company's cellophane. DuPont acquired U.S. patent rights in cellophane in 1923, but it was soon revealed that water vapor could penetrate the film. This fact precluded its use for food packaging.
DuPont scientist William Hale Charch (1898-1958) resolved this problem, and in 1927 a patent was issued for the moisture-proofing system. Cellophane continued to be highly profitable through the 1950s, but by the 1960s new products began replacing it. Cellophane production declined through the 1970s and early 1980s with DuPont discontinuing it in 1986.