Abstract: A sealed package is provided wherein a plurality of quantities of product in a stack, such as cheese slices, are hermetically sealed in individual compartments by interleaf sheets which are releasably sealed to a backing board. Interleaf sheets are positioned between the respective quantities of product in the stack and releasably sealed along the marginal edge portions of the interleaf sheets to a peripheral portion of the backing board, outwardly of the edges of the quantities of product which are thereby encapsulated. The interleaf sheets can be hermetically sealed directly, respectively to the backing board in a progressive, concentric manner, or to each other with the innermost sheet sealed to the backing board, to form progressive but coincident seals. The backing board can be flat, or cup-shaped with a flange to which the interleaf sheets are sealed.