Quilting is, first and foremost, an art form, but there is a definite part of solid mathematics involved in creating a beautiful finished product. To neatly project a project as big as a king size velvet coverlet, the measurements must be accurate and sewing must be impeccable. At least as much attention must be paid to the cover as to the front to do justice to the amount of effort and effort you have already invested in your king size quilt.
Measure your finished quilt top. Lay the blanket flat. For a king size velvet coverlet, this may require moving furniture. Use ruler or flexible tape measure, take three widths top, middle and bottom and three length measurements both sides and in the middle. Use the largest width and maximum length measurement, and add 8 inches of Vick room to both numbers 12 inches if you plan to win the back of the cover on the front instead of pipes.
Design your velvet coverlet back. First, consider your backing options. With a king size quilt, you have to puzzle a bed together. Fabrics are available in 45, 80 and 108 inch widths. Even the 108-inch width is not sufficient for a king size backing; the smallest king size duvets are 105 inches, leaving only a 3-inch margin. You can buy two or three lengths of the same fabric or use two different fabrics one in the middle and another at each end – to create a sophisticated finished coating. Select and buy the fabric. Wash backing fabrics with hot water and ordinary detergent to wash the finished blanket. Iron your panels to remove any wrinkles. Sew your panels carefully with 1/4 straight seams, either with a machine or by hand.
Sew your panels carefully with 1/4 straight seams, either with a machine or by hand. About machine quilting, you can roll the panels up in length so that only the two edges you sew together are free; again, this helps keep the large volume of extra fabric under control. Make your quilt sandwich. Fill out the completed backing or liner, with the right side down. Velvet coverlet fabric according to the instructions or your own design. About machine quilting, roll up excess fabric and pin it in place to minimize the loose fabric. If hand quilting, load the blanket sandwich into a quilting frame and work on one section at a time. Tie your edges. Use either separate strips of fabric, or pull the loose edges of the lining around from the back to the front.