CMYK Optimization for 40 Cards

I have a complete 40-card deck laid out in Canva and exported as PDFs, but the files are still in RGB with rich-black mixes. Before I send them to the offset press I need each card converted properly to CMYK, all blacks replaced with a clean 100 K, and every image checked to be at least 300 dpi.

Along the way please balance and optimise the overall colour so the artwork doesn’t dull out in print. If anything drops below print-safe resolution, gently upscale or flag it so I can supply a sharper asset.

Deliverables
• Press-ready CMYK PDFs (either one combined file or 40 individual PDFs—whichever workflow is easier for you)
• All blacks converted to 100 K, zero C/M/Y
• Verified 300 dpi resolution throughout, with any fixes applied
• A short report listing what was adjusted on each card so I have a clear record for the printer

These will go straight to an offset printer, so adherence to standard print profiles is important. Feel free to work in Adobe Acrobat, Illustrator, Photoshop or any other pre-press tools you prefer—just give me files that will pass a pre-flight check without drama.