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 addition to painting money he should paint something else very simple, such as Campbell's Soup cans. In an interview for London's "The Face" in 1985, David Yarritu asked Warhol about flowers that Warhol's mother made from tin cans. In his response, Warhol mentioned them as one of the reasons behind his first tin can paintings: Several stories mention that Warhol's choice of soup cans reflected his own avid devotion to Campbell's soup as a consumer. Robert Indiana once said: "I knew Andy very well. The reason he painted soup cans is that he liked soup." He was thought to have