100% k type converting to 4/c type during PDF export.

[rong41016940]

When exporting to a PDF file black text is converting to 4/c text which isn't desired.  Preferences for Appearance of Black is set as Output All Blacks Accurately. Select Export Adobe PDF and change Output settings to Color Conversion "Convert to Destination" and Destination "US Newsprint SNAP 2007".  I do not want to preserve numbers as attempting to reduce ink density of placed SWOP images - this works except for the conversion of type to 4/c text.

[Test Screen Name]

‌if you convert colours then I would expect text to be included.

[rong41016940]

Why would 100% black convert when below SNAP maximum total ink? Would think the conversion would honor 100% k and not change to a 4/c k, particularly with the Appearance of Black or output set to not change.

[Test Screen Name]

In general, if you convert to a profile all input is changed (by converting to Lab and back again). That's what you ask for... Why would 100%K be immune? Unless there is an option to do make 100%K immune of course. If you select "preserve appearance" this is talking colour science, not printing press, and so blacks go into the wash.

[Test Screen Name]

More thoughts: design with the final CMYK set. No conversion needed, then.

[rong41016940]

Appreciate your responses. Our client prefers to create ads and images at SWOP given their multi-media requirements, we were hopeful to reduce ink density at the page level specific for newsprint. InDesign Export PDF process is almost the solution as everything was OK except the 100%k type converting to 4/c type. Recognize we could convert with additional steps / software solutions, preference to keep the conversion within InDesign output options.

[Test Screen Name]

But by converting you are asking for exactly what happens. It would actually be WRONG to preserve 100%K by strict colour theory, though it could be an option. This is of course not at all what a prepress workflow needs, and is part of the reason why ICC profiles are not the magic bullet that they are widely believed to be.