Occasionnal print problem - Ring marks

Hi,

Printing on Baryta I just got theses ring-shape ink marks, I don’t know why it happened.
Any idea ?

Frankie

(can’t upload the picture, getting an error, I’m trying to upload it in a new comment)

Looks like a paper/coating defect to me

-W

I’ll keep an eye on this roll, thanks Walker

I have never seen anything like this before.

Frankie