Summary

I made it for my friend. The photo shows his first self-produced dry plates.

Sometimes it seems very strange how simple the model or make is, but it is almost impossible to find a good stl file.
Let this model be the center of attraction to other good products that I found on the DIY Internet.
https://www.thingiverse.com/thing:5306413
https://www.thingiverse.com/thing:4786517
https://www.thingiverse.com/thing:5317246
https://www.thingiverse.com/thing:2423724
https://www.printables.com/model/238897-4x5-sheet-film-drying-rack/files
https://www.printables.com/model/1326536-4x5-film-drying-rack

Compared to the original, I increased the number of places for the plates, increased the distance between them + fixed a small flaw, due to which the original did not have 90 degrees in the open position.

Use it and be happy.