全球造纸市场的涂布纸白度一直呈上升的趋势,甚至新建的亚洲工厂把纸的白度作为他们厂的出口性能指标之一。涂布纸白度已经成为销售过程中要考虑的一个买点。增加白度的较经济的方法很少,但是已经证明,在涂布过程中添加碳酸钙是有效的。碳酸钙的3种普遍存在形式是大理石、石灰 The whiteness of coated paper in the global paper market has been on the rise, and even the newly established Asian factory uses paper whiteness as one of their factory’s export performance indicators. Coated whiteness has become a sales point to consider buying. More economical ways to increase whiteness are rare, but it has proven effective to add calcium carbonate during the coating process. The three ubiquitous forms of calcium carbonate are marble, lime