I have a 100-page PDF master file exported from LuaLaTeX. Several of the pages need to be trivially edited in Inkscape. So I separated them from the master file and opened them one by one in Inkscape. But, in Inkscape itself — and also when I export them back to PDF — the font of these separate pages is ruined: on my computer, the pages' font looks thinned; and, in print, the very same pages' font looks bloated and lower quality. (The unedited pages from the original 100-page master file look in print as they should.)
Why is this happening? From Inkscape, I've tried exporting them at 1000, 600, 96, etc., DPI, yet the problem persists.
In Inkscape, I'm importing the pages via Poppler/cairo (no fiddling with these settings helps).
Here's an example of the font of the digital master file:
Here's an example of the font of the digital "thinned" Inkscape file (please ignore the size difference; notice the weight difference):
Here's an example of the printed master file:
Here's an example of the printed Inkscape file (please ignore the size difference; notice the weight difference):