That’s a good point worth noting and testing for with regard to the reflective surface David.
Thanks for confirming that David.
The reason UV and Thermal printers can print to the polyester surface is that thermal is a dry ink ribbon cured onto the material surface via the print head. Whereas UV printing is cured instantly via UV light as it is applied to the surface.
Inkjet printers use heat and fans to cure the ink, but some printers may not reach the heat required to cure the ink on the polyester, and others may not do it fast enough. So the ink simply smudges or runs off the surface. I think the fact the film is chrome/reflective will also prevent proper curing temperatures as the film will reflect heat. Meaning much longer or higher heat exposure to cure the solvent.
The reason I mention HP Latex “might” do it, is really just down to the fact I have printed mirrored Chrome wrapping vinyl through our latex machines. the heat used in HP latex printers is substantially more than solvent printers, exceeding 100 degrees. It is still chrome and will reflect, but it is also a cast vinyl and has a more porous surface, which will help again, whereas Polyester is not porous.
I think the most pain-free option would be to get your supplier of the Holographic film to send it directly to your trade print supplier and specify UV printing to the material. They will take the headache of the whole process away. Obviously, the trade printer must have a UV printer.
Alternatively, ask “David Wilde” if he is able to quote you for doing the work, and if he can, it keeps the trade work amongst our members. Win-Win! That said Martyn, I am forgetting you are based in Finland, mate. 🤔