Looking to make a sheer dress to be worn over a shift/slip. Using the sleeves and neckline from
Vogue 1558 but with an elasticated waist, so no pleats or waist seam. I have a cheap poly chiffon and a pricier embroidered one, so I am thinking overlocked seams for the cheap one as a wearable muslin, and then french seams for the fancier one. I would prefer to leave out the zip, so I am thinking a keyhole/open upper back and a button on the back collar.
Any tips for a keyhole back in sheer fabric? Haven't quite decided how I will do it yet: I could leave the back seam in and leave it open half-way, or cut out the keyhole and use bias binding, or use a facing, or add a split back yoke. Any other suggestions? If I use bias-binding can I use self-fabric or do I need something more opaque?