It is really important to know where and where you have not sprayed. Make sure you use gloves because it really likes to stick to human skin. If it does I find that dial soap is the best soap to remove it.
Product Information
Monterey's Mark It Blue Spray Solution Colorant
Use Mark It Blue to show where you have sprayed. It is a concentrated blue colorant that when sprayed, provides a temporary evidence of spray patterns. Typical ideal uses include parks, golf courses, turf, grass areas, athletic fields, basically any place where spray evidence is needed.
Mixture Rates
Use 1 oz of Mark It Blue per gallon of water. Add it to the spray tank when it is half full.
Benefits
Show where your've sprayed
Eliminates waste
Indicates drift
It dissipates readily and is non-toxic, but avoid contact with fabrics.