Context: Paper made from wood pulp is not necessarily less durable than a rag paper. The ageing behavior of a paper is determined by its manufacture, not the original source of the fibres. Furthermore, tests sponsored by the Library of Congress prove that all paper is at risk of acid decay, because cellulose itself produces formic, acetic, lactic and oxalic acids.

Question: Who sponsored the tests that show that all papers are subject to acid decay?
Answer: Library of Congress

Question: Besides formic, acetic, and lactic acid, what type of acid does cellulose produce?
Answer: oxalic

Question: What is definitely more durable than rag paper?
Answer: Unanswerable

Question: What is determined by the ageing behavior of paper?
Answer: Unanswerable

Question: Who sponsored tests that proved all paper is risk free from acid decay?
Answer: Unanswerable

Question: What does oxalic acid produce?
Answer: Unanswerable

Question: What does lactic acid produce?
Answer: Unanswerable

Question: Who sponsored the tests that show that all papers are not subject to acid decay?
Answer: Unanswerable

Question: Besides formic, acetic, and lactic acid, what type of acid does cellulose not produce?
Answer: Unanswerable