Best way to remove rich black

[DJS]

what would be the best way have a flightcheck to check for RGB, convert to CMYK and making the "rich black" 100% Black (either before or after the CMYK conversion)
is it better to have it as an action so it happens before the flightcheck or as part of the "CHECK ON:" in preflight?
I have tried both and they leave me with a black made out of CMYK

[freddyp]

Converting RGB to CMYK is an edit and edits are of course done before checks.

What is "rich black" for you? The solution could be (there is not enough information to be sure):
Select color range - where you define the ranges that represent rich black for you
Change color - to 0% DeviceGray or 0/0/0/100 DeviceCMYK

As you seem to be happy with 100% K you could also take the approach that anything that looks black, should be black only:
Select black & white objects
Change color

[DJS]

Thanks for the guidance, have it all working now

[freddyp]

And which solution did you choose? Please share it with the people on the forum.

[DJS]

Hi, thank you for your reply, it has helped me understand things in greater detail. in the end I opted for a simple option, as the only files we had with RGB black were word documents and they have a consistent colour breakdown when saved as a PDF, I ran select/change colour to 100%K as an action so it happened before any of the other checks in the flightcheck.