dry mount
n.
The process of attaching a flat object, such as a drawing, text, or photograph, to surface without the use of liquid adhesives.
Notes
A common dry mount technique is to place a thin sheet of tissue covered with a heat-activated adhesive between the object and the support, then place the sandwich under the platen of a heated press. Another technique involves a thin layer of adhesive between two layers of silicon release paper; one sheet is removed, and the object to be mounted placed on the adhesive, then the second sheet is removed leaving the adhesive on the object without any tissue.