Any ink maker can tell you how a certain test is performed. Testing for color? Use a spectrophotometer. Testing for viscosity? Use a viscometer. And so on. Every ink maker also knows why these tests are performed. If an ink doesn’t perform the way it’s supposed to, it won’t last very long in the marketplace. With the multitude of products and companies out there, a customer will gladly go to a competitor for ink if they can get a more reliable product. If the life of the product and the reputat...