archival storage of garments

I went down a research hole trying to figure out what the best way to store the extremely delicate antique, actually 1920s beaded silk chiffon dress I found in a vintage store that fits me and was ridiculously cheap and in insanely good condition aka UNICORN FIND. I've been thrift and vintage shopping my entire life and this is officially the best thing I have ever found.

Long term storage by hanging is bad since the weight of the beads will slowly cause the whole fragile silk chiffon amazingness to shred downwards. ;_; Therefore, flat storage.

Amazon and Google now think I have a wedding dress to store lol, the targeted advertising is following me around the internet and it's pretty funny what recommendations show up.

Ended up half-making a muslin garment bag, didn't bother making the pocket, left the bottom open for access and need to buy a zipper first and some of that acid free tissue paper to put between layers and use to pad corners so they can't crease themselves permanently or crease and then shatter. Yes, "shatter" is the correct word for what happens to old fabrics sometimes. I'll post about shattered synthetic fabric from circa 1940-50s and The Time I Accidentally Got Into Vintage Furniture Restoration and Woodworking another time... #CosplayIsTheIntersectionOfAllCrafts

Link to Dreamstress' (a fantastic resource) instructions on making a muslin garment bag: http://thedreamstress.com/2012/01/tutorial-how-to-make-a-simple-garment-bag/ (Not compensated in any way for this link.)

No photos because ehhhhh I'll take photos when it's done with gorgeous 100ish year old dress in it ok?