pH Indicator Strips

Non-bleeding Merck Universal pH Strips provide a visually simple and quick means of measuring the pH of liquids, or surface pH on paper and textiles. To measure the pH of a porous surface, drop some deionised or distilled water onto the surface and cover with this special strip. Compare the strip to the pH 0-14 colour scale provided, and proceed with your project. Each box contains 100 strips.