Banggood

Product as advertised, accurate enough for my purposes at this time. I received 5 times 80 pieces as expected.

a fast test with various solutions (acid and base) was ok. the color has a tendency to go away and you can stain yourself or any surface that are in contact with the pH paper after it has been used.

Muy buen precio para lo recibido

good

Buen producto envío rápido lo recomiendo

As expected

ممتاز

The test strips are designed to work in the whole range of pH - from very acidic to very alkaline, which makes it less accurate for practical use. I got to use it only once so far, and I was able to determine that my solution had pH between 5.5 and 6.5 and not more precise. If you can live with an error of 1 in the pH scale, then this is for you. If you need a more accurate measurement, this is not for you. Buy a separate pH meter, or more specialized test strips, with limited range, but more ac

Paper strips to measure the PH value of fluids. Put a few drops on the paper and it will get a specific colour, which corresponds with a PH value. In the package there is a scale from PH 1 to 14 with the corresponding colours. If you want to measure really accurately, you will need to buy an electronic PH measuring device. But this works great when you don't need that. Thanks Banggood!

The pH test strips came safely bundled up and I wasted no time and put them to good use. I had access to a pH meter and some buffer solutions with which I did some calibration of the test strips. They have turned out pretty good. I can confidently order more once I get through this lot. Great stuff Banggood!