Canning novelty. Early methods of manufacture employed poisonous lead solder for sealing the cans. Studies in the 1980s attributed the lead from the cans as a factor in the disastrous outcome of the 1845 Franklin expedition to chart and navigate the Northwest Passage. Later studies found this to be false. Increasing mechanization of the canning process, coupled with a huge increase in urban populations across Europe, resulted in a rising demand for canned food. A number of inventions and improvements followed, and by the 1860s smaller machine-made steel cans were possible, and the time to cook food in sealed cans had
Campbell's Soup Cans Ferus Gallery in Los Angeles. This would be Warhol's first one-man show of his pop art. Warhol was assured by Blum that the newly founded "Artforum magazine", which had an office above the gallery, would cover the show. Not only was the show Warhol's first solo gallery exhibit, but it was considered to be the West Coast premiere of pop art. Andy Warhol's first New York solo Pop exhibit was hosted at Eleanor Ward's Stable Gallery November 6–24, 1962. The exhibit included the works "Marilyn Diptych", "Green Coca-Cola Bottles", and "Campbell's Soup Cans". Warhol sent Blum thirty-two canvases of Campbell's