Sewing on the corner squares and turn them into triangles.
Thanks to Mary Ellen Hopkins for teaching this technique in a workshop I took with her. This is her adaptation of the technique for putting on connecting corners. See her excellent book, It's Okay to Sit on My Quilt, or any of the books in her Connecting Up series of books.
|Step One: Pair up the squares. To the left is the square cut from Fabric B in 4.5 inches and two smaller 2.5 inch squares in Fabric A.|
|Step 2: To the right is the B square with the Fabric A put on top with right side of both fabrics together.|
|Step Three: Sew. To the left is the sewing example. You do not need to mark this diagonal. Just start in one corner and sew to the opposite seam. If you sew so your stitching line veers slightly toward the corner you will have a straight seam when you press.|
|Step Four: Cut. At the right is the way to cut. Only cut the flap from the small square. Do not cut off the back large corner! (This is the Mary Ellen Hopkins technique part.) Trim to leave approximate 1/4" seam allowance.|
|Step Five: Press. To the left is the pressed example. Line the corner of the top square up with the bottom larger square as you fold it over and press. This guarantees that the square is still a perfect 4.5 inch square. Rotate the square as shown so the upper right corner is ready for the next square to be added.|
|Step Six: At the right is shown the addition of the second square to the adjacent corner. is the sewing example. Be sure to put it with the right side of the fabric face down.|
|Step Seven at left: Sew the 2nd corner. Remember, you do not need to mark this diagonal. Just start in one corner and sew to the opposite seam. If you sew so your stitching line veers slightly toward the corner you will have a straight seam when you press. Note: You will be sewing over the corner of the previous triangle, this is correct.|
|Step Eight at right: Cut this corner as you did the previous corner.|
|Step Nine - Last: Press. To the
left is the final press to finish the block. Line up the corner of the small square with
the larger square to make the square match up.
Now you'll have an exact 4.5 inch square. Yes, the fabric will be double at the corners - it's supposed to be.