I have no idea how much of a problem deinking will be for Landa's nano inks but their process in not so similar to hot extrusion lamination. I have experience with extrusion coating and there of course, the pressures are much higher and the temperatures are very high due to molten plastics.
From what I remember, Landa was claiming that the transfer was without heat but it turned out there was some extra heat added just before the transfer point. Most adhesion is due to attraction at the molecular level. That is why with extrusion coating and other processes, substrates usually need flame treating or corona treating to ensure good adhesion. Sometimes primers.
I have heard the claim that they can print on any substrate but I am still curious about this. I would be surprised if they had very high adhesion levels. I could imaging failures in adhesion between the dried nano ink films and the substrate. Maybe if one shakes the printed sheet too much all the dots will fall off.
So the claim is that they can print on any substrate. As long as that substrate is not made of the same material as the blanket which is supposed to release all the dried nano ink films.
I think their revised-revised-revised schedule had them doing bata testing with customers now. I wonder how that is going.