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 topics for those who had not even seen the piece. Warhol's pop art can be seen as a relation to Minimal art in the sense that it attempts to portray objects in their most simple, immediately recognizable form. Pop art eliminates overtones and undertones that would otherwise be associated with representations. Warhol clearly changed the concept of art appreciation. Instead of harmonious three-dimensional arrangements of objects, he chose mechanical derivatives of commercial illustration with an emphasis on the packaging. His variations of multiple soup cans, for example, made the process of repetition an appreciated technique: "If you take a Campbell's