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[BKARTS] Johnson Edition Paper

Just in case, Jet, you want more information: If the paper, and odds are good, has an alum rosin sizing then the yellowing you see is likely caused by the degradation of the size. This will contribute to a weakening of the paper itself.
Also, an overabundance of alum in the paper can lead to the degradation of the paper fiber especially in the presence of residual chlorides from the bleaching process. Aside from being used to promote the even settling of the rosin on the fibers alum was used as everything from a mold inhibitor to an anti-frothing agent. The exact mechanisms by which alum can cause fiber degradation are still not fully understood.
As Karen noted your edition predates the large scale use of wood pulp in papermaking. However the industrialization of the various processes was well underway marked especially by the introduction of strong chemicals to speed pulp preparation.
It is the residue of these chemicals which is largely to blame for the deterioration of paper of the period.
It was and still is possible to make absolutely horrible paper from the very finest initial rag content.
Best, James

Edelpappband / "Millimeter" Binding Bind-O-Rama, Entry Deadline - October 1, 2005
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