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MINERAL PRIMARY FILLERS WORLD PULPPAPER50 The second part of the trial was carried out with the goal of utilising the savings made in steam consumption for increasing the machine speed and was thus carried out with a base weight of 110 gm. As expected it was possible to increase the production output by more than 3 through the addition of 5 primary filler. Changes in strength properties remained within the levels seen as part of general measurement or process fluctuations. As in the first part of the trial the porosity was significantly reduced. a 1 increase in production is possible for each percentage point of fresh filler added These results allow the conclusion that a 1 increase in production is possible for each percentage point of fresh filler added and thus confirms the concept. In terms of economic benefits adding fillers to testliners and kraftliners through the use of a suitable calcium carbonate is a very interesting approach for manufacturers. This relates not only to savings in energy and raw materials but far more importantly to the clear potential for increasing production by using a primary filler. These positive results will be checked further in extended long-term trials in the near future. Figure 3. increase in production is possible 100 Production th Steam Pressure bar Reference - 15 102.2 103.7 Production parameter 100 100 100 99 100 101 102 103 104 Trial - 18 Trial - 20 110 100 Short Compression Test CD kNm Ring Crush Test kNm Reference - 15 100.7 106.3 Quality parameter 95.5 100 105.5 80 85 90 95 100 105 Trial - 18 Trial - 20 100 Burst Strength kPa Air Permeability Bendsten mlmin Reference - 15 96.4 96.8 Quality parameter 98.4 100 89.2 70 75 80 85 90 95 100 Trial - 18 Trial - 20