Poly-Treat Check is conveniently packaged in a jumbo size felt pen. The checking process may be carried out anywhere without the need for special equipment or messy testing materials. The test results are visually available within FIVE SECONDS.... no costly delays while awaiting them. Since a specialized blue ink is prepackaged in this pen, the test is an accurate one. Finally, if you are using an anilox roller for testing, you will soon find that unnecessary. As a result, the inconvenient and time consuming cleanup of this equipment after each test will be eliminated.