Effects of Wet on Dry and Wet on Wet Printing on Print Density

Pages:259-261
Ambrish Pandey and Ravinder (Department of Printing Tech., GJUS&T, Hisar, Haryana)

To cope up with customer’s expectations and quicker production needs, single color offset printing presses are being converted into multicolor with the passage of time. 90 GSM Art Paper was selected to be printed wet on dry and wet on wet on single color and multicolor offset printing press respectively with a quality control chart having ink patches, trapping marks and slur bars. The quality of printed patches was evaluated using X-Rite 530 Series spectrodensitometer in terms of solid ink density and ink trapping parameters. The results clearly indicated that the density was found more on wet on dry printed paper due to better ink trapping in this case than wet on wet. The coated paper resulted into better ink hold out due to its better ink absorption characteristics.