Problem, certain areas in exported pdf print differ from the background (Gray/black)

[#1]

Hey,

I have an issue with my exported pdf. 

First, I inverted colours (black/white) in Illustrator from a picture in order to match the background from the file in my InDesign project. My defaults in Illustrator are in CMYK as well as in InDesign.

From my InDesign project:

After exporting:

Sorry in advance, but i'm a beginner, maybe this is just a small problem or I have a fallacy.

Cheers

[#2]

Hey,

I have an issue with my exported pdf. 

First, I inverted colours (black/white) in Illustrator from a picture in order to match the background from the file in my InDesign project. My defaults in Illustrator are in CMYK as well as in InDesign.

From my InDesign project:

After exporting:

Sorry in advance, but i'm a beginner, maybe this is just a small problem or I have a fallacy.

Cheers

[#3 · Accepted solution]

I assume that the your barcode is vector file.

Is there one rectangle object arround the barcode?

Open your barcode in illustrator and eliminate the rectangle object arround the your barcode.

In illustrator leave it only the white barcode without nothing else.

Save it as .ai  and then import your barcode in indesign

[#4]

Thanks for looking into my issue anyway!

[#5 · Accepted solution]

Problem solved. Somehow, CMYK changed back to RGB in Illustrator as I changed it. Hmm.

Thanks anyway!