pH Indicator Kit-
Measures pH levels from 0-13. This special tape will change color and indicate pH of any water-based solution. Wetting the carpet and quickly pressing on to the area. Indicates level of ph. Necessity for carpet cleaners to know the ph of the stain. For example, on makeup stains area usually high ph at 12, to remove make up then you would use a stronger chemical like ph 13.
Also for Carpet dyers by neutralizing the carpet to around 7 to 8 ph, it assures the dye will set into the carpet fibers.