Review on Litmus Strips Universal Application Testing by Stetson Olsen

This is a great value for money pH litmus test kit. cardboard) and the color chart is printed on the inside of the flip book. This makes it all too easy to accidentally contaminate leftover litmus strips while trying to determine the pH of the strip you're using, either by accidentally brushing it off or leaving a few marks on the lid (which then flips over). litmus strip when closing the lid). Therefore, a color card on the outside of the package (or a separate card) is preferable, especially if it is made of or covered with non-absorbent material. A real case will happily pick up moisture around its edges if you put a strip of litmus on top. However, at this price, you shouldn't complain too much!