pH Test Papers–Various types of indicator papers cover a wide pH range to allow for good accuracy of determining pH value of a solution

Ion Test Papers–Detects concentration of specified ion in solution. Two-point indicator strip confirms within pH range and ion concentration by color comparison.

Litmus Paper–General detection for whether solution is acidic (Blue) or alkaline (Red).

Dip the indicator test strip in solution and compare to the color chart on the container. For Litmus paper a color change is confirmation.

High sensitivity and sharp color change. Narrow pH unit graduation: 0.2-0.4 (UNIV/ WR: 1.0-2.0 units; Congo Red: color change to red indicates within specified range only).