What does “acid-free” mean?
The term acid-free is generally accepted and employed to describe products that are pH-Neutral to Alkaline (7 or slightly higher on the pH Scale). There are few papers remaining that are not buffered to a neutral pH using additives like Calcium Carbonate and by taking other steps during production processes. The pH levels should only be accepted when cold water extraction or better methods are used. Also, please note that acid testing pens are not reliable for either a pass or fail reading. 23.
