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It happens—pressure builds, rolls clog, blades break, plates swell, substrates shed or absorb ink. These perils place the outcome and quality of a pressrun in jeopardy. Steps can be taken to minimize—if not outright avoid—such mishaps. Knowledge and skill are required to assess the situation and act accordingly. It takes a mere matter of seconds to save or ruin a job.

Basic knowledge of how inks, anilox rolls, doctor blades and other materials interact proves essential to keeping the press running. Here, with the assist of Siegwerk, we present a simple opportunity to test your knowledge of fundamentals. Answers, as well as observations on why that choice or choices is/are the correct one(s), appear on the next page.

1. What reduces excessive dot gain on the substrate when printing?

2. What type of ink is most popular in the U.S. for surface printing on polyolefin substrates?

3. Why are flexo inks limited to less than 20 percent acetate solvent?

4. Ink adhesion is attributed to which ink component?

5. The chambered inking system has what two blades?

6. The chambered inking system was designed for what use?

7. Ink performance can be attributed to which of the following criteria?

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