This pH testing pen by Lineco allows you to determine whether paper or board is acidic. Easy to use, simply draw a small line on your surfaced. The chlorophenol red indicator solution in the pen will turn purple on any paper with a pH of 6.8 and above. A clear or yellow color indicates the material is probably unsuitable for conservation purposes. Please note: unreliable results may occur on colored or coated papers.
- pH Testing Pen
- Determine whether paper or board is acidic
- Simply draw a small line to use
- Pen will turn purple if pH is 6.8 and above
Average: 3.9/5 Stars | Total Reviews: 31
Our Score: 80