Cultural paper and printing paper is heading the low basis weight and lighter trend, but one of the core problems is the opacity. Carbon dioxide could react with Ca(OH)_2 solution, which modifies fiber with nano-calcium carbonate film on its surface, this modified fiber obtains optical quality that ordinary calcium carbonate has, what is more is that its consistency is close to fiber. Using this new material to make paper with plain fiber instead of calcium carbonate, this dissertation analyzes its e...