Black is black, right?
No. Look out for body text made up of all four process colours. Instead of solid black, it’s made up of a mix of tints. It often happens when text is created using RGB based colour spaces
How did that happen?
Instead of 100% black linework, text is output using a combination of black, cyan, magenta and yellow.
image to show what black text looks like when it is composed of 4 colour process elements

4 colour black text shows ‘fringing’ in cyan, magenta and yellow under a magnifier – it’s not pretty

Swatch out: Creating text using RGB swatches is the primary cause. Even in established industry apps such as InDesign™, we regularly see documents which have mistakenly defaulted to web or mobile output settings.
But I often use rich blacks in headlines: Yes, this is different. We’re talking body text. Using more than one process colour to build small black text can result in text that appears heavier and/or softer than intended. Normal, slight variations in registration of the 4 colours on press can cause other colours to show around the edges of the text that was intended to appear as black.
OK, get rid of it for me then:
Happily, it’s really not that difficult. Two steps and you’re there:

setting output intent in Adobe InDesign

check your output intent in InDesign is set to “print”

  1. Make sure your document colour space (or output intent) is CMYK. If your doc is made for web or mobile, you need to change it to print.

  2. Check your colour selector / swatches and change the colour to 100% process black.
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