
As an Industrial and Scientific Chemist, I use these papers daily for testing pH levels in my experiments, and they never disappoint. Vivid Paper provides accurate readings and has a wide range of applications, especially for measuring acidic and alkaline solutions. The only downside is that they're disposable, so they can add to the cost, but the convenience and invaluable data they provide more than make up for it. Highly recommend for anyone needing reliable substance analysis instrumentation.

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