Digital BW, The Print

I have a customer with a framing meltdown, I suspect they used an improper mounting adhesive.
I've seen info in the past about sticking with acrylic adhesives and avoiding PSA adhesives.
Of course this means little to me, but I need reliable info to pass on to the framer, and I've lost the info I saved from the past for just such an event.
Now that a few mores years of experience have past, can anyone give reliable adhesive recommendations for large coated fine art paper prints?
I'd prefer they were just hinged, but people seem insistent on mounting...
Thanks
Tyler