jpg background become pixel when linked to an illustrator

[btride]

hello people,

i'm building sings at illustrator and linking an RGB background, jpg file (to an CMYK file), and when i export to PDF file and check it on Photoshop - the background gets pixels that is not there when i open the jpg background alone on Photoshop.

it seem that this software passing destroy a bit the file, and that it is better for me to build it on Photoshop so it will remain clear, with out and pixels.

why is that?

ive tried to save the liked files on EPS file and its a bit better... not perfect

[Monika Gause]

You can't "check" a PDF in Photoshop.

Use Acrobat for that.

Apart from that: check your export settings for the PDF. Maybe resolution is too low.

[btride]

i export on press quality, and this checking on Photoshop tells me the quality of the file on when be printed.

[purushoth_j]

Show me a screenshot. First check the background jpg by opening it in Photoshop.

[btride]

that is what i donw, see bleow - the first screenshot will be the jpg on Photoshop:

and this after liked to an illustrator file ans export to pdf:

[purushoth_j]

Ok, I can see that you've opened the PDF in Photoshop. Instead, open the PDF in Acrobat as Monika said. When you import the PDF file in photoshop there will be bluriness. Better you check the file by opening in Acrobat.

[btride]

how?

how can i see quality, 1:1 on acrobat?

how i can see there what  will end on print? (this are big sings)

if i want to check how it will be on print- i see that only on Photoshop...?

[btride]

ive checked on acrobat as well, its the same result...

same how, the link to a vector file destroys the background, but if i im building the sing on Photoshop, and export a jpg or even PDF file - it keeps the background well. i dont understated why?  and how can i fix it instead of building it on Photoshop?

[Monika Gause]

Please learn how to do Acrobat preflights. There should be some advice in the documentation and there should be trainings on LinkedIn Learning.

Also: I have no clue what you're expecting from a raster image. Of course it's either pixelated or blurred (or both) when you blow it up.

Pick up the phone and talk to the people who print your sign and ask them for their specifications and then deliver exactly that.

[Test Screen Name]

The second screen shot clearly shows JPEG compression artefacts. So JPEG has been placed then recompressed as JPEG.

1. Avoid JPEG in the page make up since you will be recompressing: use TIFF or PSD.

2. Check your PDF export settings, they are important - never just use the default.