Abstract
In electrophotographic printers and copiers, the fuser fixes resin particles of graphics on sheets of paper by pressure and heating. It is known that curl is generated after the fusing process. One of the main factors of the curl generation is the temperature difference between paper surfaces in the heating. We have revealed the generating mechanism of the curl, and developed the method to predict the amount of the curl. In the recent year, there are many brands of paper, which are imported or recycled, sometimes generate large curl that causes the degradation of printed quality. We start to study a prediction method considering paper properties that are possible to describe the differences among paper brands. Permeability is the most influencing parameter of the curl, and the amount of curl of ten paper brands are calculated by three methods to lead permeability. The result is that the prediction of the curl difference between paper brands is good at the experiment when the permeability is calculated from the porosity to be led by ash ratio of paper.
