I got two books from Kelby (ligthroom) and watch a short free video
But I can't figure out if when I export my catalog to be handle by 3rd party specialists
my final jpeg will loss print quality (i usually print 40cm x 80cm)
Today I export a final proof jpeg from my original (non-catalog) and it was 2236 x 1491 pixels / 2,62Mb
And a final proof from the catalog (same image) and it was 2076 x 1384 pixels / 2.20 Mb
My deep doubt is "Does this loss of Mb and pixels will give a poor final paper print facing the original??"
thank you so much
Of course, lower resolution ends up in smaller possible printing size for a given quality.
I'm not sure I understand you're workflow and what your intention is. Could you please describe it in more detail?
Always make sure when exporting a catalog for external work to include the negatives (RAW images).