*) price incl. VAT, plus shipping costs
- Code: 94750
- Weight: 0.008 kg
In stock, delivery: ca. 8-10 working days
Testing pen to identifiy acidic or alkaline paper. Chlorophenol red is the pH indicator agent. To use the Abbey pH Pen, draw a small line or spot in an unobstrusive area of the material being tested. If the mark is pale yellow, the paper is acidic. If the mark is pale purple, the paper is neutral or alkaline. On papers of intermediate acidity, the mark will turn a tan colour that combines yellow and purple.