A paper manufactured in such a manner as to resist chemical action which may result from impurities in the paper itself, as a result of materials or methods used in manufacture, or agents from the surrounding atmosphere while in storage.
A “permanent” paper, is one which resists the effects of aging to a greater degree than is usual in ordinary paper.
This quality of paper would be manufactured from 100% rag (new linen), flax, cotton, or hemp, undyed and unbleached, and produced by hand or machine. It would contain no loading or color additives, and beating and drying would be controlled so as to obtain maximum folding and tearing strengths.
These papers would be used for state or other archives, fine printing, treaties, political records, etc.