A way to make successful tissue paper pattern pieces flat and storable without tracing them again or having to glue things (also, a good use for gummed paper packing tape, my new favorite thing):
Final pattern piece…
Tissue paper is flimsy!
Paper packing tape to the rescue!
Flatten out the wrinkles and edges
Flatten out the wrinkles and edges.
Cut a strip of tape and wet it (doesn’t take much moisture– don’t overdo it)