pH Testing Pen – Lineco



The pH testing pen provides a quick and easy method for testing the acidity of paper.

Simply draw a line and watch the colour as it dries. The chlorophenol red will turn purple/lavender as it dries if the paper is acid-free or neutral pH, while yellow or colourless indicates acidity.

Additional information

Weight 0.04 kg
Dimensions 18 × 6 × 2 cm

In stock