Partition Cardboard prevent intermingling and compressing of products to be packaged with another packaging material. Partition cardboard is used for preventing contact and sorting the products placed inside the parcel. Partition cardboard corrugated cardboard state and single corrugated cardboard are generally preferred. Partition Cardboard is also requested as reinforcement to periphery inside the parcel. Peripheral reinforcements are cut and prepared for placing inside parcel all around from BC dopple wave cardboards. Peripheral reinforcement is especially used for packaging products with longer storage periods and preventing deformation of parcels during piling operations.