Mottling and its Effect on Coated Printing Substrates While Printing by Using Digital Printing Machines

Print mottle is considered as one of the most important print factors while considering the visual impression of print quality. It is basically the result of uneven ink layer/non-uniform ink absorption across the paper surface and it is more prominently visible in middle tone images or areas of uniform colour such as solids and continuous tone screen images. Mottle pictures can also be observed visually and hence it needs utmost care and attention for enhancing the final print quality. Various grades of papers are used in the digital printing machines for a wide variety of print products and for the high quality print products coated papers are generally used. Effect of mottle on coated paper especially when using digital printing machines is the basic point which needs discussion and deliberation.