Ph Test Strips, 160 Full Range Strips 1-14 Universal Litmus Paper Soap Making For Water Saliva Wine Urine Soil, 2 Packs Of And 6 Units

I purchased these for my son's science fair project. They worked really well!

These strips are convenient and work great. I recommend storing them in a plastic bag so humidity doesn't degrade them.

I bought these to test the Ph of skincare products, because my skin can get alllll angry if I'm not careful. These work almost instantly, it's a nice big test strip so easy to read, soyou're not squinting at the color chart, and they're a really good deal. I will probably not use even half of these before they expire, but I will buy them again when that happens.

The strips are pre-cut into stacks within the booklets that make them easy to use. I calibrated them with some substances I knew the pH of (baking soda water, distilled water, and lemon juice and found them accurate.

Really nice product. Strips tear out easily and very easy to read. I had three different water sources I wanted to check and you can see by the pic, the differences (which I completely expected) showed very clearly (would be easier to see if I put it on a white background for u to see) Only suggestion is to have the comparative color guide on the outside of the cover and not inside. I don't want to contaminate the unused strips accidently even though there is a minor chance of it happening. The white page directly beneath the strips (which covers the unused strips) is also nice, but would be better on the side to more easily compare with the color chart, but overall a great product.