Ink removal by washing and synthetic surfactants

Ink removal by washing and synthetic surfactants The goal of pulp washing is to eliminate disturbing particles smaller than 30 µm. These particles are, in particular, fillers, coatings, fines, micro- stickies and printing inks (see Unit operations and equipment in recycled fibre processing). Figure 1 shows the working principle of the ‘Vario-Split’ washing unit. The