Hydrion pH Test Papers

Includes Color Comparison Chart.

• Wide range shows sharp color change for each full ph unit
• Narrow range papers show a color change for each half pH unit

The wide range (1.0 - 12.0 and 1.0 - 14.0) shows a sharp color change for each full pH unit. The narrow range papers show a color change for each half pH unit. Packages of five rolls.