Package of 100 paper strips for checking pH from 0-14. Made in China.
May 21, 2021 by Russell Toy
Q: How long should these test strips be submerged in water? The amount of time can vary between manufacturers.
A: The manufacturer does not specify how long to submerge the strips. However, they do say: "Please wait around 10-30 seconds for the sample to dry and show an accurate color."
Junk
I've used 7 or 8 strips , some from each little booklet and not a single one showed any reaction whatsoever. I do not recommend these. Williams Brewing kindly refunded my purchase and stated they are looking into this issue.