Measuring viscosity is important because knowing how quickly and easily the ink will flow will help determine how the ink performs on the press, and at what speeds the press will be able to operate at while using a particular ink. Put simply, viscosity is a measure of the thickness of an ink on a press. What does one look at when testing certain aspects of an ink, such as color, viscosity and rub? What do the results mean? Questions like these deserve a deeper look. This general answer to the question, “why do we test?” is a serviceable answer, but there is certainly more to be said. If the life of the product and the reputation of the company are at all important to the ink chemist, then testing is important too. 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 an ink doesn’t perform the way it’s supposed to, it won’t last very long in the marketplace. And so on.Įvery ink maker also knows why these tests are performed. Testing for color? Use a spectrophotometer. Any ink maker can tell you how a certain test is performed.
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