All done! In addition, this type of seam is best for lightweight woven or sheer fabrics. A French seam is often used when the fabric is too delicate to overcast the seam allowance to prevent raveling. This seam is best for straight seams, but should not be used for curved seams. French seams are good when you want to have super extra professional-looking, clean seams — like on the back of an apron where you’ve pieced together a couple different fabric patterns — or when you want to avoid raw edges from unraveling in the washer — like the pillowcase I’m making right now. The other seam is turned down and hemmed by hand. (Source: wnk1029) The National Sewing Circle. 12.Mock French seam (1) This is a seam which can be used in place of french seam where a french seam may not be possible like in a curved seam line, for eg. The use of a French seam is not restricted to any particular clothing style or type. A French seam is one of the best ways to finish a project. You can do French seams either by hand or with a sewing machine. This will neatly finish the seam line also. armholes of a transparent dress. This makes it ideal for children’s clothes. With a straight French seam, you'd be forgiven for sometimes stitching the 1/4" first, and other times stitching the 3/8" first. This is website curated by 4 wonderful and talented American seamstresses who have built a database of instructional videos; some you can watch for free and others for a small fee. You can be sure the garment is sturdy when you use this seam because all seams are sewn twice. With a curved seam, it is imperative that you sew the wider 3/8" seam first, thereby reducing the likelihood of ending up with a bunchy, puckery finish. The construction of a French seam provides a clean, finished, professional look to the inside of the garment, such as concealing pinked edges. How to sew mock french seam.