What is floating? When should you use it?
Floating a piece means to place the piece of art on top of a solid board without cutting a window (opening) for it. This is a great effect if your piece has a deckled or torn edge that you want to show off or if important bits of the image are right at the edge of the paper. Art framed this way often includes spacers or shadowboxing to create air space between the art and glass. We can also raise the art off the backing to create a little extra shadow. This is called a pedestal.
A glass float (or glass sandwich) frame is when two pieces of glass are cut larger than the art and the glass is used like a mat. Keep in mind that the color of your wall will directly affect the way the art looks.