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【Non-bleeding】- The indicator dyes used in these Camlab test sticks are fixed to the cellulose fibre pads, eliminating colour bleeding 【CE-certified】- CE-certified pH test strips for body pH measurement for saliva and urine. This product can be used several times a day over a long enough time period before consulting with a health practitioner 【Plastic sticks】- Camlab Water pH indicator sticks are made from plastic to enabling better handling 【Sturdy】- These sticks can be left in weakly buffered solutions until the final colour is obtained, and are suitable for use in solutions of low ionic strength 【Colour chart】- Supplied with an easy to read colour chart on the plastic case to easily identify the pH