A couple of jobs finished today, the piece framed in the top photo has the paper float mounted so the edges of the paper are seen. A piece of foamboard under the paper raises it from the backing mountboard, creates a shadow and gives the floating effect.
The second frame has a single extra thick mount, there is a gap between the mount and the paper, this is created by having another unseen spacer mount. This is done because the artwork framed is a pastel, and sometimes small pieces of pastel can come away from the paper and drop down. The intention is that these pieces will fall down into the gap and not collect at the bottom of the mount.