... 5. stable package Item Name:pH Test ReagentHow To UseDrop three globelets into water, then the paper ... ,low price, new type,easy to operate,convenient to carry Target: effective to any colorless alkaline solution whose ph ... a bottle Instrucion: drop 3-4 the reagent to 50ml tested solution and shake,or drop 1- ... 2 reagent to half solution, Compare resulted color with the color on the card ,then we ...