a) Basic-sulfite semichemical (NSSC) process
b) Acidic-sulfite semichemical (NSSC) process
c) Neutral-sulfite semichemical (NSSC) process
d) Alkaline-sulfite semichemical (NSSC) process
Answer: c
Explanation: The neutral-sulfite semichemical (NSSC) process (applied mainly to hardwood chips) uses sodium sulfite and a small amount of sodium hydroxide or sodium carbonate to give slightly alkaline liquor. The NSSC pulp is obtained in higher yield but with higher lignin content than in the other sulfite processes. It is used mainly for the manufacture of corrugating medium.
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