Why rag paper is considered long lasting?

Q.1023: Why rag paper is considered long lasting?

Ans. Rag paper contain cotton fiber from one or more of following sources;

Cotton linter
rag/old cloth
cloth cutting
textile mill waste etc.

Cotton is the purest form of cellulose available naturally and cotton fiber if not longest, is one of the longest fiber( 20 - 35 mm compared to soft wood fiber length of 4 mm) . These two properties i.e. purity of cellulose fiber and long length, make paper long lasting and strong.

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