Faintworthy!Oh, thanks to everyone's likes and sweet comments!
Here are some pics, I have kept the 90cm in their envelopes but without boards. The stacks are roughly organized by color and even though I can't see everything in 1 glance, it's not difficult to pull out a stack to match with what I thinking of wearing and putting them back in drawer is easy.
There doesn't seem to be any dust to worry about.
One thing I would do differently is to have faceless drawers with a dip for pulling out, because having face and hardware means rivets on the inside of the drawer and one might worry about accidental pulls against the rivets. I solve that by putting that blu tack stuff over the rivets.
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May I suggest using something else rather than blu tac? Part of my duties used to be office reno. When we cleaned up walls which had posters on them attached with blu tac, we would find little dots of grease staining the paint work under the blobs of blu tac.
Maybe use the felt dots which are sold to protect hardwood floors from chair legs? Or paint over the rivets with a thick layer of clear nail polish?