Plaque Wood

Whats the name of the 70′s trend of glueing poster prints to large wood pieces?

I have seen a few very large vintage poster prints glued to wood with no glass covering and wondered if that type of art/ framing had a name. They arent plaques, some were very large. It seemed like a trend in the 70′s.

The technique is called Decoupage, and you can find decoupage medium at any craft store. Mod Podge is the most popular brand, though you can make your own decoupage medium by thinning white glue with water in a 1:1 ratio.

Remembering Caylee Anthony – Wood Plaque