3″ x 2″ Water Sensitive Paper

Keep several packages of this 3″ x 2″ Water Sensitive Paper from Spraying Systems Company on hand. Why? Because these specially-crafted papers help you evaluate your spray distributions, droplet densities, swath width and penetration of your spray. Each package includes 50 water-sensitive yellow cards that stain blue from water spray droplets, as well as white oil-responsive cards that turn black once exposed to oil droplets.