Features & Benefits
- Easily distinguish between safe alkaline paper and unsafe acidic paper
- Chlorophenol red indicator solution turns purple on paper with a pH of 6.5 or higher
- Produced by trusted brand Lineco for archival quality framing, bookbinding, and photography
- Made in the USA with materials suitable for long-term storage of important documents
- Simple to use – just draw a small line on the material to test
- Please note: Unreliable results may occur on colored, coated, or unbuffered materials