A comparative study on roll-to-roll gravure printing on PET and BOPP webs with aqueous ink

It should be also noted that the images printed on BOPP exhibited enormously higher chromaticity and thickness compared with those on PET at the same dilution and machine factors. The large difference in ink transfer efficiency between the BOPP and PET substrates may be explained partly by the difference in interfacial tension and absorption of the BOPP substrate.