Recycled fiber use Recycled fiber use Charge control of additives improves recycled board production. A wet end survey and online charge control optimized runnability of a board machine and cut costs of chemicals. Mayr-Melnhof Karton is a major manufacturer of coated board made out of recycled fiber. The cardboard is produced in seven facilities in Europe and mainly used for folding cartons for food applications. The Deisswil mill in Switzerland run three board machines. Machine KM6 produced approximately 200.000 tons per year of speciality greaseproof board. At KM6 the challenge was to counteract increased chemical consumption, quality problems and poor runnability. To begin with, laboratory measurements were made to determine the zeta potential and the cationic demand of the raw mat

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