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Verified Purchase
Works for me

After hearing about zap tests and other ways to test soap, I prefer these strips the best. There is a chart to let you know if your product is within range. I trust these strips and they have been accurate and reliable.

Verified Purchase
needs a reference guide

These would be a little more useful if they came with a reference guide as to what is a safe result when testing your soaps. I've had to go on multiple websites to try and figure out what my results mean. Needless to say, I'm still a little unsure. If anyone a brambleberry could explain the colors scale on the PH strips that would be helpful!