Tips to Cook Puff or Sponge Blanket
Puff blankets are often called sponge blankets. To sew one of them, plan out the pattern of a puff quilt on paper using a grid of nine squares across and 11 squares down before choosing fabrics. Fill in the blanks with colors or shades of gray to create a layout. The finished duvet will be approximately 32 by 38 inches in size.
This technique is different from the traditional method used to make quilts, so before you start, check out the pattern to get an idea of the whole assembly process.
Fabrics and consumables
3 yards of fabric for the upper squares (can be neat or patchwork)
2 yards of muslin or other fabric for the back squares (they will not be visible on the finished blanket)
1 yard of fabric for the (final) base
1 1/2 packs of oblique tape folded in half (or make your own strapping)
Embroidery thread and a sharp needle for embroidery
Polyester fiber filler (one bag or a little more)
Safety pins or carnations
Cut out 99 of the top 6-by-6-inch squares
Cut 99 5-by-5-inch squares from muslin (or other fabric used for the back squares).
Square Footage Assistant
Assume that the usable width of the fabric is at least 40 inches:
You can cut 6 six-inch squares from a six-inch wide strip of fabric cut from edge to edge (maybe seven if the usable width is 42 inches).
You can cut 8 five-inch squares from a five-inch wide strip of fabric cut from edge to edge.
How to pin the squares of a quilt
Pin the upper square of the fabric to the smaller square of muslin (the wrong side of the upper square should be adjacent to the muslin). Align all the corners and center the resulting folds of the upper square, as shown in the figure. Leave one side of each pocket loose to fill it after.
Repeat by attaching all the upper squares to the muslin square.
Arrange the pinned squares in rows, orienting all the folds in one direction.
Use a 1/2-inch seam allowance to sew the square pockets in each row together. Do not remove the pins from the unstitched edges.
Sew a 1/2-inch seam on the sides of the outermost pockets.
Put each row back in its place in the layout.
Sew a 1/2-inch-wide seam along the bottom edge of each row, orienting the allowances for short seams so that they diverge in opposite directions from row to row so that they fit well together when connecting the rows. After stitching, remove the pins from the bottom of the rows.
Use the holes at the top of the rows to fill each square with a fibrous filling. Carefully fill in the squares, but avoid repacking – too much filling will make it difficult to secure and stitch the rows together.
Sew a 1/2-inch seam allowance along the open edge of the top row.
Pin and sew the rows together, observing the seam allowances.
How to make a substrate
Place the quilt lining fabric right side down on the table. Put the blanket on top with the right side up.
Use safety pins or carnations to hold the layers together.
Pass a thread of embroidery floss through the embroidery needle and tie each corner of the pocket with a square knot. Move from the upper right corner to the lower left.
Remove the buttons or pins and align the lining to the edges of the quilt. Stitch the edges of the quilt with a basting or zigzag stitch.
How to sew a binding
Pin the oblique ribbon around the blanket.
Sew the binding to the quilt with a suitable thread, using a wide zigzag pattern and a short stitch length. You could also tie a quilt with a double folded binding.
Wash the duvet.
Change the size of the blanket
To sew duvets with squares of different sizes, cut out the back squares one inch smaller than the top ones.
When making miniature duvets, try to cut the back squares 1/2 inch smaller than the front squares and use a 1/4 inch allowance for all seams.
Experiment with the dimensions to see what works best.