Illustrator changes the ppi of an image when i rotate it.

Forum|Forum|5 years ago
August 26, 2020
7 replies
7539 views

Hello, i've been having this issue for quite some time now. Whenever i place an image into my illustrator file and then rotate it, the ppi changes. It's caused issues with our printing facility as they won't print when the artwork is less than 300ppi. Can someone help me with this issue? I'm attaching screenshots for reference.

J

Jennifer34735256qdg6

Participant

Here we are now in January 2024 and I have this problem. I Googled the solution and I came to this forum so still not fixed.

Doug A Roberts

Community Expert

I hope you also voted on the issue at the Uservoice link.

J

Jennifer34735256qdg6

Participant

No idea how to do that - just joined

C

Catsz27328627pbi3

Participant

Interesting I found this issue more than 10 years ago and it still around...

K

Konrad5CB3

Known Participant

It's very annoying indeed, especially considering Indesign does not have this issue within their Links panel. In Indesign Actual and Effective PPI is displayed correctly no matter what transformations you do to it. I see this is a thread from 2020 but it's half way through 2022 now and this still hasn't been fixed. Surely it can't be that difficult, relatively speaking?

Brad @ Roaring Mouse

Community Expert

If you are submitting a PDF as final artwork, then this will not be an issue. Unless you are downsampling when you make the PDF, the image is still full resolution whether you see it or not in Illustrator (A Preflight in Acrobat will confirm this)

Based on your images, it looks like you might be doing a display panel of some sort (like a pull up banner?). If that's the case, your printer requesting 300dpi is actually waaaaay overkill for that process anyway. If you are giving them a raw Illustrator file with the linked graphics, and they refuse it, they really don't know anything and you should find somewhere else to go. ;).

Another thing to note: Your image is a linked file anyway. Nothing you do in Illustrator is changing the resolution of a separate file.

dino camponi

Participating Frequently

Hi Roaring Mouse,

With all due respect, the issue raised by the OP has nothing to do with the suitability of 300 dpi resolution... it has to do with AI's failure to properly display the effective resolution after rotation of an image. If you see this for yourself and have the time and inclination to vote for a fix, please do...

https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/32853844-image-...

Brad @ Roaring Mouse

Community Expert

Already voted. I was just adding to the reassurances that the OP's file will be fine, despite the bug. Sorry for the editorializing, I was being a bit tongue in cheeky, but my point is, if the printer still brings this up as an issue, the OP might want to point them in the direction of this thread.

John Mensinger

Community Expert

"It's caused issues with our printing facility as they won't print when the artwork is less than 300ppi."

It's a false report caused by the software's inability to account for pixels that have been rotated off the pixel grid, even after they are re-rotated back into alignment. This is one in a series of reasons Illustrator can be considered an inferior choice for composing layouts that include raster images.
Disallowing anything under 300ppi is a ridiculous restriction to apply in such blanket fashion. The ubiquitous 300ppi rule-of-thumb is a dumbed-down catch-all intended for people with limited understanding of image-to-print mechanics. It's disheartening to hear of print professionals who don't know better.