Shrink Film is applied over or around an item, often by a shrink wrapper or shrink wrap machine of varying degrees of automation, It is then sent through a heat tunnel or oven for shrinking. The film reacts to the heat to shrink down tightly to the product. A shrink wrapper some times called a shrink wrap machine seals the film around the product then applies heat to shrink the film . This process can be done by a few different ways ie. Manual, Chamber, Semi automatic or a Fully automatic shrinkwrapper described as the ultimate shrink wrap machine.