Transparency and flattening

[Ragdoll]

I keep getting a warning "Transparency: We detected an element that may be transparent within your file. We strongly recommend flattening or removing any transparencies in your file.

with my pdf I've uploaded to lulu.com. 

I have tried uploading a file containing only three pages of text and I still get the same message.

Created using Affinity Publisher 1.8.6 press PDF Flatten

Any ideas ??

[Ragdoll]

i found this on robert-chalmers.uk and it worked for me

If printing to send to a Print on Demand (POD) print firm or publishing house, then find out their preferred PDF format, which will most likely translate to the Affinity options listed below.

• PDF/X options are pro-print PDF presets that create PDF files that output to CMYK colour space and can embed all fonts.
  • PDF (PDF/X-1a:2003)—based on PDF 1.4, flattens transparency, no colour management
  • PDF (PDF/X-3:2003)—As for PDF/X-1a:2003, but supports spot colours and allows colour management. RGB or CMYK images with attached colour profiles are supported.
  • PDF (PDF/X-4)—As for PDF/X-3:2003, based on PDF 1.6, supports transparency

From that point, it will produce a PDF document that you can open in the usual way – Adobe Reader. Check you book for mistakes, errors, wrong pages and all the rest. Often, seeing your book in another format will highlight things you have missed during your edit phase.

 

[emartin]

Update: nevermind, I think I may have gotten it fixed but if you have specific advice on what you did let me know.

I'm running into the same issue. Did you get it fixed?

I tried the PDF (flatten) export settings and practically all the others but still getting the transparencies error in Lulu