Both regular pressing and regular pressing use flat roller pressing. The structure of flat roller pressing is that the upper roller is a stone roller and the lower roller is a rubber roller, both of which have flat and smooth roller surfaces.

　　Stone roller is a common type of flat press roller. Stone rollers are usually made of materials that are easy to peel off from paper, mostly using granite. The main characteristic of granite is that there are many small pores in its tissue, which store a certain amount of air and are conducive to the peeling of wet paper pages. Its disadvantages are high cost and easy brittleness. During operation, if the speed is too fast or the load is too high, it may cause overheating of the shaft head, resulting in axial or annular cracks on the surface of the stone roller. Severe high-temperature expansion can cause the shaft center to fall off.

　　With the increase of paper machine speed, the limitations of granite rollers are becoming increasingly apparent. Nowadays, most artificial stones made by mixing rubber and quartz sand are used instead of natural granite as upper pressure rollers.

　　The lower roller of the flat roller press is a cast iron roller with rubber coating. In addition to providing the corrosion resistance of the pressure roller, the most important thing is to provide good elasticity and ease the pressing effect of the upper pressure roller on wet paper and blankets, thereby extending the service life of the blankets and reducing the "compression" of wet paper. The elastic rubber wrapping lower roller can also give the two rollers a good indirect contact and uniform dehydration effect, and compensate for the high errors in the lower pressing roller.

　　When producing general paper, the rubber hardness of the rubber roller is usually 70-90 Shore hardness. The hardness of the rubber rollers used for each pressing line in the pressing department increases accordingly with the increase of pressure on each pressing line.