The Kappa number is an indication of the residual lignin content or bleachability of wood pulp by a standarised analysis method.
Read more about Kappa Number: Measuring Method, Application
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“One may confidently assert that when thirty thousand men fight a pitched battle against an equal number of troops, there are about twenty thousand on each side with the pox.”
—Voltaire [François Marie Arouet] (16941778)