AFY7 Posted October 13, 2020 Posted October 13, 2020 We have a book with images in grayscale (original, not converted). We tweaked the contrast of those images to look good in print. In earlier editions of the book, the images rendered correctly in exported PDFs. The contrast was perfect. Now, however, images in exported PDFs from the same Publisher file have reduced contrast. We do not know how to correct this issue. In the attached image, the page on the right is what we desire (and what appears in Publisher workspace). But what we get now in exported PDFs is what is shown in sample on the left.
Staff Gabe Posted October 16, 2020 Staff Posted October 16, 2020 Hi @AFY7, Sorry for the delayed reply. Can you upload your project file (including any resources) to this link so we can have a look?https://www.dropbox.com/request/vw5zRPqEKMhk4PzgbXYn
AFY7 Posted October 16, 2020 Author Posted October 16, 2020 Gabe, Thank you! I uploaded the project file, with resources embedded, plus one sample resource.
AFY7 Posted October 21, 2020 Author Posted October 21, 2020 Gabe, I have made some progress in diagnosing this problem. I have discovered that the image problem (low contrast) happens only when exporting using PDFX-1a:2003 or PDF/X-3:2003. When exporting using PDF 1.4, 1.5, 1.6, or 1.7 the problem does not occur and the images have the proper (high) contrast. My printer, IngramSpark is recommending exporting using PDFX-1a:2003 or PDF/X-3:2003. I don't think I can do that. Do you know why PDFX-1a:2003 or PDF/X-3:2003 cause this problem but not PDF 1.4, 1.5, 1.6, or 1.7? Thanks.
Staff Gabe Posted October 22, 2020 Staff Posted October 22, 2020 We are aware of some PDF/X issues where the exported PDF is CMYK, which is what we see here. Your document is grayscale, so it's affected by this issue.
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