Question

Which of the following is the primary objective of bleaching?

(a) To increase strength

(b) To maximize yield

(c) To increase brightness

(d) To remove lignin

The question was posed to me by my college professor while I was bunking the class.

This question is from Pulping, Digestion and Bleaching in chapter Paper and Paper Based Packaging Materials of Food Packaging Technology

Answer 1

The correct answer is (c) To increase brightness

For explanation: Bleaching is a chemical process applied to chemical and mechanical pulps, primarily to increase their brightness but it also improves the cleanliness of pulp through removing extractives and other contaminants.