Monoprints are as you would expect, 'one-offs', made by virtually any method that transfers a mark from one surface to another.
Usually coloured ink or paint on a flat surface has paper placed lightly onto it. Then tools are used to apply pressure to the back of the paper and the reverse image appears.
Similarly the design can be drawn directly onto the glass sheet, and then a print is taken from this.
There is wide scope for very exciting experimentation using stencils and collage too.