I want to know the answer to the following question:
What decade does the sulfite process date to?
All the background I'm provided with is that "The kraft process, invented in the 1870s and first used in the 1890s, is now the most commonly practiced strategy, one of its advantages is the chemical reaction with lignin, that produces heat, which can be used to run a generator.". Is that enough to answer the question?
Answer: no