The key to the stock preparation concept is the OnEfficiency.DIP (deinked pulp: recycled waste paper without color residues) system from Voith, which has already proven effective for the manufacture of graphic papers based on recovered paper. The efficiency concept is now being used for the first time in the production of packaging papers. In the stock preparation unit of the new PM 2, ultra-modern sensors and actuators ensure consistent raw material quality and low running costs.

In the PM 2 in Spremberg, Voith is also testing a new prototype of a virtual sensor which uses the measurements in the stock storage tower and the process parameters to predict contamination areas. The DIP optimizer uses the model calculated in this process to optimally adjust the variables. The self-learning system allows for automated controls, which means that the full potential of the system can be reached sooner.

Following a groundbreaking ceremony on 26 September 2018, work began on Hamburger Rieger's new paper machine in Spremberg. From June 2020, the 7.8 m wide PM 2 will produce up to 500,000 metric tons a year of White Top Testliner with various basis weights. The two-loop DIP line produces the white top layer of the WTTL (White Top Test Liner). The paper manufacturer has opted for a particularly environmentally friendly de-inking system for stock preparation.