| 摘要 |
The invention relates to a method for precipitating calcium carbonate (PCC) in a non-rhombohedral crystal form, said method comprising: introducing a source of calcium ions and a source of carbonate ions into process water of a mechanical pulp mill; and arranging the carbonate ions to react with the calcium ions to form precipitated calcium carbonate (PCC) in a non-rhombohedral crystal form. This invention further relates to a method for preparing printing paper product comprising PCC made by said novel method. This invention further relates to said paper product. |
