I need to export an ad that I've created in InDeisgn for print in a newspaper which I don't have any experience with, the production team has asked that I flatten the images and remove the transparency.
My understanding is that I do this by selecting PDF/X-1a (compatibility Acrobat 4) preset when exporting to PDF which will flatten my file for me. However, this creates a lot of 'defects' in the PDF. For example a white border line around an area of drop shadow. My question is, will this show up and affect the final print quality of the ad? Or better, what is a way I can flatten my file without getting defects?
I have checked the 'output preview; in Acrobat and the white box outline still shows even when I preview 'simulate overprinting' . I haven't used any pantone or spot colours.
I have also tried flattening the PDF from Acrobat but this just created even worse defects in my PDF file.
My question is, will this show up and affect the final print quality of the ad?
Stitching artifacts show up on low resolution devices (screens), so assuming the newspaper is outputting to a high resolution platemaker they will not show up in print.
Rob has given you excellent responses, but my advice when designing for archaic workflows such as this is design according and avoid transparency wherever possible.