The public has been left shocked after discovering the truth about how pre-packaged sandwiches are made. Many had believed they were prepared in small batches in supermarket kitchens, but the reality is a large-scale factory operation.
Footage from the Science Channel's 'How It's Made' series reveals the process, starting with automated bread slicing machines that discard flawed slices. Workers then manually apply butter and other condiments before adding fillings by hand. Sandwiches are stacked and cut by machine, then packaged manually into cardboard casings, which are heat-sealed shut.
For popular fillings like egg mayonnaise, fully automated assembly lines use robots to dispense precise amounts of filling and pack the sandwiches. The finished products are typically delivered to shops within 12 hours and have a shelf life of around three days.
The use of bare hands by workers has particularly disturbed viewers. Social media comments ranged from humorous to outright disgust, with one user stating, 'It's been years since I've bought a premade sandwich, and after seeing this, I can confidently say it will be many more years to come before I buy another.'
