Hydrion paper is a brand of litmus paper manufactured by the Micro Essential Laboratory corporation. It is often called pH paper because it contains an indicator that changes to a different color for every pH, or power of hydrogen, meaning that it can measure the acidity of a substance.Continue Reading
Because solutions containing silver are not readable by an electronic pH meter without a special probe, using Hydrion paper to determine the pH of a solution is considered the easiest method.
Litmus paper generally comes in two colors: red and blue. The blue paper stays the same when submerged in basic substances, while the red paper retains its color in an acidic environment. When red paper is placed in a base, or blue paper is placed in an acid, the paper color changes.Learn more about Acids & Bases