“Your black will print grey (or too much ink).”
Plain black ink (C0 M0 Y0 K100) prints as a dark grey on large areas; adding some cyan, magenta and yellow under it makes a deep “rich black”, often C60 M40 Y40 K100. But small text must stay 100% K only, because four inks that don’t line up perfectly make small type look blurry. And very heavy blacks (all four inks near 100%) can smudge, which is the “too much ink” warning.
Updated November 3, 2026 · by Azaan Ali, print designerWhy printers ask for this
Black ink alone isn’t perfectly opaque, so big black backgrounds look flat and greyish next to anything printed with rich black. That’s why designers build rich black for backgrounds.
Overdo it, though, and the sheet carries too much ink: 400% when every channel is at 100. It takes too long to dry and can rub off onto the next sheet. Most printers set a limit around 300%. On small text, four inks slightly out of register leave coloured fringes, so text should be black ink only.
How to set up black correctly for print
- Large black areas and backgrounds: use rich black, usually C60 M40 Y40 K100, or the exact recipe your printer gives you.
- Body text, small type, thin lines and barcodes: 100% K only (C0 M0 Y0 K100).
- Never use registration black or C100 M100 Y100 K100: that’s 400% ink.
- In Illustrator or InDesign, check with the Separations Preview panel. In Acrobat, use Output Preview → Total Area Coverage.
- Turn off “overprint black” only if your printer tells you to; it’s usually what keeps text crisp.
Or send it to us
- Set rich black for backgrounds and pure black for text and barcodes
- Bring total ink under your printer’s limit
- Fix grey-looking blacks in images and logos
- Check overprint settings so black text stays sharp on colour
Questions
- What is the best rich black CMYK value?
- C60 M40 Y40 K100 is a safe, common recipe with a total of 240%. Some printers prefer a cooler (more cyan) or warmer black, so ask for theirs.
- Why does black text look fuzzy?
- It was probably built from all four inks. Make it 100% K and it prints from a single plate, perfectly sharp.
- What is total ink coverage?
- The sum of the C, M, Y and K percentages at any point. Most presses want 300% or less; newsprint goes lower.
Terms on this page: Rich black, CMYK.
Other things printers say
More on this kind of work: Print file fixing.
Send us the file.
Ask a question or send the file in the chat. A fixed price comes back within hours, and nothing starts until you say yes.
