Question

________ expresses the lignin content of pulp.

(a) Beta number

(b) Gamma number

(c) Kappa number

(d) Alpha number

This question was addressed to me by my school teacher while I was bunking the class.

Origin of the question is Paper Basics topic in portion Paper and Paper Based Packaging Materials of Food Packaging Technology

Answer 1

Right choice is (c) Kappa number

Easy explanation: Kappa number expresses the lignin content of pulp. A high kappa number indicates a high lignin content. The kappa number of bleachable softwood and hardwood pulps is 30–40 and 18–20 respectively.