• Duotest indicator papers combine two different indicator zones on a single strip
• The zones are separated by a hydrophobic barrier, which effectively prevents mixing of the reaction colors and increases the mechanical stability
• Gradation (pH): 1.0 - 1.3 - 1.6 - 1.9 - 2.2 - 2.5 - 2.8 - 3.1 - 3.4 - 3.7 - 4.0 - 4.3
