Abstract: This invention patent refers to processes and appliance for slicing food, stacking and protecting obtained slices from exposure to the environment, through a continued flexible separator, with foldable flaps, in contact with side, front and rear surfaces of referred slices. There available on the consumer market, at supermarkets and bakeries, manually sliced and stacked cheeses, susceptible to oxidation and contamination. Conditioning of these products in consumer's refrigerator does not provide protection for all contact surfaces of slices, which, often, dry up, become moldy and stick to each other. The proposal of this invention is to protect all contact surfaces of food slices—even after their consumption has already started—when closing entrance doors to a possible contamination, especially for protein food with high moisture content, such as cheeses and sausages which are excellent means of microbial culture.