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Old 09-29-2016, 01:00 PM
Turble Turble is offline
Join Date: Dec 2007
Location: Eastern PA
Posts: 2,058
I'm sticking with a guy who worked in a paper mill operating a stamp mill.

They did (and still do) smash the rags into pulp to make high grade paper. The Hollander machines cut the fibers rather than smashing, making shorter fibers which makes lower grade paper but makes it a lot faster.

A good book on the subject which I happened to read a couple weeks ago:
Paper: Paging Through History