| 摘要 |
THE PRESENT INVENTION DISCLOSES THE USE OF BLEACHING AGENTS TO INCREASE THE BRIGHTNESS OF FILLED PAPER. IN THE PROCESS OF THE PRESENT INVENTION, FILLED PAPER IS TREATED WITH BLEACHING AGENTS DURING THE PAPERMAKING PROCESS. THE PROCESS MAY BE USED ON ALL GRADES OF PAPER THAT CONTAIN FILLER. HOWEVER, THE PRESENT INVENTION IS PARTICULARLY USEFUL ON LOW BRIGHTNESS GRADE PAPERS THAT ARE PRODUCED FROM MECHANICAL PULPS AND CONTAIN A CALCIUM CARBONATE.
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