Already a member?
Sign in
| Version | User | Scope of changes |
|---|---|---|
| Nov 8 2006, 9:52 PM EST (current) | Anonymous | 11 words added |
| Nov 8 2006, 9:48 PM EST | Anonymous | 32 words added |
Changes
Key: Additions Deletions
Add more information on this subject by clicking the EasyEdit button.
Number that refers to the acidity or alkalinity of paper (acid-free products have a pH factor of 7 or above). Special pH tester pens can help determine a product’s acidity or alkalinity.
