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
The Food Defect Action Levels etc.). For example, the limit of insect contaminants allowed in canned or frozen peaches is specified as: "In 12 1-pound cans or equivalent, one or more larvae and/or larval fragments whose aggregate length exceeds 5 mm." "The Food Defect Action Levels" was first published in 1995. A printed version of the publication may be obtained by written request to the Food and Drug Administration (FDA) or by clicking here. The insect fragments are classified as an aesthetic problem. "The Food Defect Action Levels" states that these contaminants "pose no inherent hazard to health." The Food Defect Action Levels The Food