I've read and heard so many sewers say that sewing sheers (i.e. chiffon, georgette, light-weight organza, batiste) is difficult. I say, "No it's not"! That is IF you know the right techniques.
What I've found most challenging with chiffon and georgette is the laying-out process. Sheers are slippery and they tend to crawl about while you are trying to handle them. What I do is use an underlay. I do this by laying the sheer fabric on top of an old sheet or muslin fabric (anything you don't really care about) and cutting them together with a rotary cutter. The sheer fabric clings to the other fabric and makes cutting a lot easier. Also, misting with spray sizing or spray starch has worked for me too!
For my seams, I use a "scant" french seam. I do this by: (1) pinning WRONG sides together. Stitch 3/8" from the edges on the right side of the fabric. (2) Trim seam allowance to 1/16". Fold RIGHT sides together, with stitching line exactly on the fold. Press flat. (3) Stitch 1/8" from fold. This step encases the cut edges. Check the right side to be sure no raveled threads are showing. Press seam to one side.
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BTW, this is Simplicity 4112... I'll have finished project pictures later.
I hope this helps those who have not or have been reluctant to sew with a sheer. This is what I do. If some of you more experienced sewers have better methods or something to add, please feel free.