The other Sigma 70 is equipped with a video camera and it is used for measuring contact angles of individual pulp fibers. The wetting force acting on the partially immersed fiber is measured, from which contact angles are directly computed. The effect of different pigments and the deinking chemicals on foam stability and flotation recovery can be investigated with the modified Bikerman type foam column. In this cell the air is mixed to the pulp suspension through the rotot-stator system. The E cell made of plexiglass is a reduced version of the mill scale flotation cell.
Air is blended with the stock suspension in the injector.
The volume of the cell is 18 liters and it is equipped with an 80-liter feed tank. Viscosity Ostwald viscometry. The liquid meniscus is detected optoelectronically and the measurements can be repeated automatically. Chromatography Gas chromatography. All three are equipped with flame ionization detectors.