A method for a multi-roll calender and a multi-roll calender for controlling the moisture gradient of a fibrous web and for enabling the manufacture of high quality paper grades, such as WFC, LWC-roto and SC-A by on- and off-line calendering. A PoP device is formed by connecting a top package and a bottom package together using a plurality of PoP connectors on the bottom package connected to corresponding connectors of the top package. The opening provides access to an interior of the base.