GEGL Negative Darkroom presets

[hornetster]

I'm assuming that there should already be presets in the GEGL Negative Darkroom (because without them, I don't have a clue!!)
Running Gimp 2.10.38 on Opensuse Tumbleweed (latest..)
I am trying to get the best out of VERY old negatives/slides (60 years or so...)
Also pointing me to any helpful stuff (preferably for the Gimp), would be muchly appreciated...
Thanks, John.

[denzjos]

I suggest to try convert some slides/negatives conversions and save the setting of the sliders. Give it a name related to the result. Then you can decide for yourself which saved setting you have to use for a particular set of negatives.
   
Some examples (part of layers)