Matting,  Continued Cutting a mat Cutting a beveled mat with a carriage-type cutter is easier than cutting one by with a carriage- hand.  Some  carriage  devices  cut  straight-edged  mats  while  other  cutters  cut type  cutter oval or round mats. You can use a combination of both types of mat cutters for creative or decorative cut mats. The devices maintain a precise angle of cut while you draw the cutting blade across a fixed beam. The blade remains the primary key to cutting a successful mat. To cut a mat with a carriage-type mat cutter, use this table: Step Action 1 Measure the inside dimension of the frame or determine the overall dimension of the desired mat. Measure the image area that you want exposed through the mat. On the back side of the mat, mark the dimensions of the desired opening. Adjust the cutter stops on the carriage to correspond with the measurements of the inside diameter of the mat, or the major and minor axis of a round or oval mat. Position the matboard face down and align with the left edge of the mat cutter. Apply pressure to the carriage to secure the matboard in place. Insert the blade approximately 1/16 th inch above the corner and draw the blade down the carriage beam to just beyond the bottom corner. The stops on the carriage will stop your stroke. Reposition the matboard for each side. The carriage for a round or oval mat will cut the mat in one continuous circular movement. 2 3 4 5 6 7 8 9 10 Remove the unwanted portion of the mat. Smooth out jagged or rough edges with sandpaper or emery board. Place and attach the image into the mat and the mat onto the backboard. 2-34