Ideal for science lessons and experiments, these Johnson universal indicator papers help students quickly and easily test the pH of various liquids. Suitable for primary, secondary and college settings, they support practical investigations into acidity and alkalinity.

• Pack contains 10 books, each with 20 strips (200 strips total)

• Narrow pH range: 1–11 for more precise results

• Colour chart included on box for easy comparison

• Simple to use and suitable for group or individual work

• Designed for laboratory and classroom use