Refill pack for pH test paper Duotest pH 3.5-6.8 (3 reels of 5m length and 10mm width)

• 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): 3.5 - 3.8 - 4.1 - 4.4 - 4.7 - 5.0 - 5.3 - 5.6 - 5.9 - 6.2 - 6.5 - 6.8