Reasons to Matte
Matting artwork gives a different emphasis or viewpoint for the artist, photographer, scrapbooking enthusiast or crafter, whether amateur or professional. The amateur can do this very inexpensively using common household items or some artist tools available at most department and hobby stores. This is an inexpensive means to achieve professional looking results. Matting will also produce themes and series with simple templates for the mattes.
Basic
If only a couple of pieces need to be matted, scissors and construction paper or heavy card stock can be used to cut out a piece the right size to fit into the frame. Be sure to use a straight edge. Do all work on the back side of the paper for the matte. If the desire is to create a theme, then a template, such as an oval or framework, can be created to give consistency within the series.
Artist's Tools
Most hobby stores and craft supply stores sell cutting tools, straight edges, squares and curves that can create distinct mattes for a series or for common elements to display. There are rotary cutters, razor blade cutters and specialty blade cutters that allow more precise and easier cuts. Straight edges in plastic, acrylic, metal and wood make the cuts consistent. Curve guides and shape templates allow creative variety for common themes and series.
Other Tools
For straight edges, thick paper, cardboard pieces and cutting mat guides can all be used. Usually these will be single use and are very unreliable because the material used as an edge can and will be cut by the tool used to cut. Cutting can be accomplished with razor knives, kitchen knives and even shop scissors with varied and sometimes good results. Bowls, molds, cookie cutters and measuring cups can be used to create unique shapes for mattes.