Acidic or alkaline? Now you can distinguish between what paper or board is suitable for conservation with the stroke of a pen. The indicator solution of chlorophenol red will turn a shade of purple on paper with a pH of 6.5 or higher. Any other color would indicate a pH lower than 6.5, thereby acidic and unsuitable for artwork that is meant to last.
| Item No. | Description | List | Sale | Availability | |
|---|---|---|---|---|---|
| LI533-0023 | pH Testing Pen | $8.80 | $8.29 | Special order |