There is a strong correlation between the PH of the body's internal environment and PH paper, help you to maintain good healthy body by testing many usual everyday substances, including moisturized soap,lemon juice,milk,liquid detergent,moisturized soil,urine,sweat...etc. Instruction ▼Take one strip into the solution you would like to measure,the color of your strip will change immediately. ▼Half a second later, compare it with the standard version of color comparison,then we can get a PH. ▼The number next to the color on the chart is your PH. The PH scale ranges form 1(very acidic) to 14(very basic),7 is neutral. This paper does not be suitable for a very weak buffer solution and the acid-solution that concentration less than 0.01%. Features Color:Orange-Yellow Paper size:45*7mm Package included:5*Set of 80pcs Ph Paper test(400pcs) Warm tip: This test paper should be stored sealed in dry and cool place to protect from sunshine and rain,three years of storage life.
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