The use of OCC was successful. Georgia-Pacific had initial difficulties with contaminants from OCC and worked with the Forest Products Laboratory in Madison to develop a cleaning process to remove them. The process is effective, but further research needs to be done. The expenses involved with researching cleaning methods and the high cost of the necessary equipment slowed progress. The use of ONP in the production of hardboard was unsuccessful.
ONP fiber is very fine and created a problem in draining the water off on the forming line.