Paper or fabric foundation pieces are used to make very accurate blocks, provide stability for weak fabrics, and add body and weight to the finished quilt.
Temporary foundation materials include paper, tracing paper, freezer paper and removable interfacing. Permanent foundations include utility fabrics, nonwoven interfacing, flannel, fleece and batting.
Methods of marking foundations include basting lines, pencils or pens, needlepunching, tracing wheel, hot-iron transfers, copy machine, premarked, stamps or stencils.
There are two methods of foundation piecing; underpiecing and top-piecing. When under-piecing, the pattern is reversed when tracing.
To under-piece, place a scrap of fabric larger than the lined space on the unlined side of the paper in the No. 1 position. Place piece 2 right sides together with piece 1; pin on seam line, and fold back to check that the piece will cover space 2 before stitching.
Stitch along line on the lined side of the paper -- fabric will not be visible. Sew several stitches beyond the beginning and ending of the line. Backstitching is not required as another fabric seam will cover this seam.
Remove pin; finger-press piece 2 flat. Continue adding all pieces in numerical order in the same manner until all pieces are stitched to paper. Trim excess to outside line (1/4" larger all around than finished size of the block).
Tracing paper can be used as a temporary foundation. It is removed when blocks are complete and stitched together. To paper-piece, copy patterns using a copy machine or trace each block individually. Measure the finished paper foundations to ensure accuracy in copying.