Seydaco Packaging Corp. specializes in custom printed folding cartons as well as generic bakery / food service stock boxes. W ... e are an industry leader with both Litho and Flexo print capabilities. Three North American folding carton operations: Seydaco Packaging Corp. Mississauga, Ontario Groupe Ecco, St-Hyacinthe, Quebec (includes Miramont Label within same location) National Carton and Coating, Xenia, Ohio read more