The primary function of an image is its colour, and in the field of printing technology, the utmost importance lies in reproducing the original colour accurately during the printing process. Following printing, all printed materials undergo rigorous quality checks to determine their acceptability. One of the critical processes in this evaluation is the calibration of input and output devices during image rendering, which is referred to as "colour difference." Sometimes, variations in printed colours can be attributed to changes in the colour visuals. These discrepancies in colour or colour shifts result from inconsistencies in reproducing colours between the proof and the final print, as well as variations in different printing tasks. Various factors can contribute to these discrepancies in offset printing, particularly when using sheet materials. Objective of this paper is to study colour optimization techniques to be used in sheet-fed offset printing presses.

Delta E, Sheet Fed-Offset, Colour Difference, Colour Variation, Colour Optimization