What shouldn’t be dry mounted?
You should not dry mount any artwork which would be reduced in value by being permanently attached to the backing board. This would include original artwork, limited editions and any collectable piece. In the minds of collectors, mounted artwork is not as valuable as the same artwork in its original form.
You should not dry mount art which will melt at 190° F. This would include wax-based artwork, fax paper and some of today’s color copies. In these cases, a careful wet mounting process should be employed in a cold press.