Mini-Encyclopedia of Papermaking Wet-End
Part Two: Definitions and Concepts
The alkalinity of an aqueous system equals the amount of strong acid (such as HCl) consumed when the pH of a unit volume is titrated to a methyl-orange endpoint (pH approx. 4.0). Relatively high levels of alkalinity may be due to the presence of bicarbonate ions, carbonate ions, calcium carbonate filler. Alkalinity tends to consume papermaker's alum (Al2(SO4)3.14H20).
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