Question

Semichemical method of pulping involves mechanical pulping followed by chemical pulping.

(a) True

(b) False

I had been asked this question in an online interview.

I want to ask this question from Chemical Pulping & Semichemical Pulp topic in chapter Paper and Paper Based Packaging Materials of Food Packaging Technology

Answer 1

Correct answer is (b) False

To explain I would say: The given statement is false. Semichemical pulping combines chemical and mechanical methods in which wood chips are partially softened or digested with conventional chemicals, such as sodium hydroxide, sodium carbonate or sodium sulfate, after which the remainder of the pulping action is supplied mechanically, most often in disk refiners.