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 time sold four out of every five cans of prepared soup in the United States, Warhol preferred that the company not be involved "because the whole point would be lost with any kind of commercial tie-in." However, by 1965, the company knew him well enough that he was able to coax actual can labels from them to use as invitations for an exhibit. They even commissioned a canvas. Warhol had a positive view of ordinary culture and felt the abstract expressionists had taken great pains to ignore the splendor of modernity. The "Campbell's Soup Can" series, along with his other