Reply To: Output Preview Acrobat

I think they may have embeded the colour profile in the PDF. If you're not viewing it in Acrobat under the correct profile blacks can seem to be four colour (to the best of my recollection, it's been a long time)

I think most RIPs will strip out any embedded profiles, so I don't see it being an issue if it's the case – but best to make double and tripple sure.

With InDesign it maybe set to ignore embedded profiles. That's why it shows as 100% black and not 4 colour.