I was asked to create a poster for an exhibit at my work. Not my expertise when it comes to how to properly format a high-res poster for print, but I've done several in the past at my job and we never had an issue with the printer.
This time, when we sent over the PDF (16"x22") to the printer, they made a comment that it looks like we're not using professional design services and they would be happy to provide their services next time. Well, they're right, but that's because there's no budget to
contract something like this out. In any event, whatever.
When the print job came back, there were two distinct diagonal black lines through the poster. Maybe 1/5th inch in thickness. We assumed it was a printer error so contacted them, this was their response:
We performed a flight check on the file and the line that you see printed is within the design of the file.
This is what is called a transparency issue. It appears that the file was not flattened before submitting, this could be
the issue in why the error occurred. The file would have to be corrected if we are to reprint and unfortunately a
reprint charge would apply.
Let me know if you have any further questions regarding this.
Part of me thinks they either didn't bother doing a very basic check of the file or
are denying a printer error in the effort to stress that we should use their design services next time. Obviously I'm not catching any heat for this error, even if it was 100% my fault, because my bosses realize this isn't something I was ever professionally trained for.
But it is my understanding that any transparency issues would follow the shapes affected. There are no diagonal shapes, frames, etc. in this design. The lines go through the centre of the poster and do not follow any of the objects in any way.
When I saved the file from InDesign, I just used File>Export>High Quality Print, turned off the Tagging feature, and added crop marks. Is the misprint likely my doing or should I be recommending we find a new printer? My gut tells me that even if this is something I messed up while exporting, any decent printer would have said, "Hey, this needs to be changed before we print."