Comparing a Stack Press and the CI Flexo Press the two Constructions looks totally different. The CI Flexo press is based on one big central impression or Common Impression drum surrounded with Flexo printing Stations. CI Flexo Press has only one Common or Central Impression drum and compared with the Stack press every single printing station has its own impression roller. In the older days the benefits of a CI Flexo Press was higher Printing Quality do to the Common or Central Impression Drum but, with Today's controlling possibilities a Stack Press could print in good printing quality. In a Stack Press It is possible to print on both sides without turning the media and on the CI Flexo Press this is not possible without turning the media.