Acid-Free Paper

Acid-free paper is a pH-neutral or weakly alkaline (pH value is usually between 7.0-9.5) paper, its production process using special processes and materials, in addition to the removal of acidic substances, acid-free paper is not easy to acidification reaction can be effectively avoided paper brittleness, breakage, and can be preserved for a long time without easy damage.
Features of acid-free paper:
Raw pulp is 100% wood pulp, free of lignin and other impurities, no acidic sizing agents (such as aluminum sulfate) are used in the papermaking process, free acid is not contained, and the PH value is 7.0 (neutral) or greater than 7.0 (alkaline).
Acid-free paper has a strong texture, high strength, is not easily discolored, has a long shelf life, and is resistant to acidic substances.