Chlor Phenol Red (CPR) 8x10in Test Paper Sheet [Pack of 24]

Detects leaks and can qualitatively give the user an idea as to the relative pH of two leaks Chlorophenol red water leak detection paper dramatically indicates the presence of water with a bright red color. The water indicator paper sheets shown in the image are 8x10" (200x250mm). The native color of the sheets is yellow and the wetted sections turn red to a deep purple (depending on the liquid's pH) when exposed to liquid water. Chlorophenol Red (CPR) test paper is useful in differentiating between a solution with an acidic pH and one with a more neutral pH. The unreacted paper is yellow/orange in color. At neutral pH (about 6.7) the paper will turn a reddish color. At higher pH values, the paper will turn more violet. Given that the paper starts out yellow/orange and turns red at roughly the pH of water, it is useful in finding water leaks.They are insensitive even to high humidity levels unlike the cobalt chloride papers. Chlorophenol Red (CPR) test paper is useful in differentiating between a solution with an acidic pH and one with a more neutral pH. Given that the paper starts out yellow/orange and turns red at roughly the pH of water, it is useful in finding water leaks. Instructions for use: 1. Remove one Chlorophenol red test paper sheet from the packaging, being careful not to touch the sheet anywhere other than where you grasp it. 2. Dip the sheet into the solution to be tested for 1-2 seconds and remove. Alternatively, place the test sheet near a seal where you suspect there might be a leak. Note: Do not dip the sheet directly into a solution that may later be consumed. Always test a sample of the solution and discard it when finished. 3. The test paper will turn red/violet in seconds if dipped into a solution that is neutral (pH ~ 7) or basic (pH >7). NOTE: The solution must be water-based or no reaction will occur.