Characterization of Anilox Rollers

Through this study we will compare the quality of print using four anilox rollers at 400, 700, 900, and 1600 lpi. A Mark Andy 4150 flexographic printing press will be used for the testing. A test form will be developed to test the print reproduction characteristics of anilox rollers in the following areas: 1. Density of Solids 2. Dot Gain 3. Minimum and Maximum Dot 4. Positive and Negative Type Face Serifs 5. Minimum Reproducible Hairline 6. 150 line Screen Image Each anilox roller demonstrated its unique characteristics. The amount of ink laid down in the solid area by the 400 lpi anilox roller was dense. The 700 lpi anilox roller performed as a good compromise between the 1600 lpi and the 400 lpi anilox rollers. The smallest positive and negative type printed well with the 900 lpi roller. The 1600 lpi anilox roller printed excellent fine lines and 3 point type. Results from this project will provide the prepress operator with the necessary data to compensate for anilox roller deficiencies during prepress. It will also serve as a guide when determining what type of anilox roller to use for a particular job.