Refill pack for pH test paper Duotest pH 1-12 (3 reels of 5m length and 10mm width)

• Duotest indicator papers combine 2 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 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12