Monday, October 8, 2012
ERIC 950™ Used with Inkjet Nonimpact Digital Printing
Jefferey Hsieh, Professor and Director of Pulp and Paper Engineering at Georgia Tech, published the article, "Deinking of inkjet digital nonimpact printing", in the September 2012 issue of TAPPI Journal. The cover prominently displays a Color Touch™ ERIC 950™as a part of the equipment used to perform the research of Hsieh.
"Preliminary experiments were conducted on samples of inkjet nonimpact digital printing papers to evaluate the efficiency of a conventional flotation deinking process in detaching pigmented inkjet submicron-size particles from the fiber surface and network. A Denver D-12 laboratory flotation cell was used per INGEDE Method 11 to test 100% ONP. ISO brightness of 58 was obtained, an improvement considered to be recyclable. However, the conventional floatation process only cleaned the inkjet-printed ONP to 47 ISO brightness. The addition of nonionic surfactant for better pulping improved the ISO brightness to 50 using the same flotation procedure. Electric field technology  was then applied for further improvement to obtain ISO brightness of 52.5 with conventional flotation—still 5.5 points short of the targeted ISO 58 goal for recycling . The reasons for this final improvement are that more surface area is available per unit volume and the hydrolyzed hydrogen or oxygen gas molecules are more likely to collide and collect the ink particles  for rising to the top of the flotation chamber for skimming. The 52.5 ISO brightness is the best that can be achieved with currently available flotation technologies."