How Papermakers Can Appreciate the Evolution of Digital Printing on the Field of Offset Quality

Industrial printing running higher than 500 copies are still highly dominated by the printing process termed analogue. However, we know that in the near future Digital printing will supplant the usual printing processes such as Offset, Rotogravure, and Flexography. Some experts announce that 25 % of printing will be termed digital within 10 years (Table 1). So that to accurately understand this figure of 25 %, it is necessary to understand precisely what means digital and which are the main digital printing systems in terms of today's market. Then, the printing processes will be rapidly described as well as the names of the different existing devices in the different classes of processes. This study carried out by CTP since 1995 is described in terms of machines studied and papers which are used .The results presented here concern the studies of runnability of papers, optical density, gloss and tests of use of papers. Processes