The crill measurement is based on comparison of two optically measured surface areas (light absorption). The total area of fibres and crill is measured with UV. The total area of fibres only is measured with IR. The “crill variable”, KFP, is a concentration independent ratio, obtained when the fibre+crill area (UV) is divided by the fibre only area (IR). No image analysis is required, making the measurements extremely fast.

“In reality this means that tear, tensile, burst index, Scott Bond and density can be calculated by this technology,” says Öjvind Sundvall, MD PulpEye AB. “As the CrillEye measurements are online, new calculations can be provided every five to fifteen minutes and less man-hour are required for doing these tests manually in the laboratory. Laboratory tests are only needed for calibrating the CrillEye equipment.”

“We now have a faster and more accurate quality follow-up and the pulp quality to the customer is defined from PulpEye”, Ulf Karlsson, President at Waggeryd Cell AB adds. “Needless to say, we are very happy with this investment”.