It should mostly be treated as a web file format.Make sure not to place your transparent images over images with spot colours. PDF 1.6 supports transparency natively.To support transparency in prior versions means rasterizing the transparent areas and mixing the colours, which is not possible with spot colours (or they are no more spot colours! With spot colours this does not work. Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Instead, there is a shaded box the size of the image/object.

The preflight engine of recent versions can list all transparent objects in a file. Thanks for visiting!A cookie is used to collect visitor statistics. You can then apply these settings for print output as well as for saving and exporting files to PDF …

Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Thanks to your info about mixed CMYK/RGB colors I came to the idea to force CMYK colors onto the whole graphic, which fixed it. This processing can increase the file size of the PDF, which can cause printing problems. Probing in Acrobat the intersection of the circles (no difference between X/3 and X/4):The difference is, that PDF X4 creates a PDF that is version 1.6 compatible.

transparent objects prior to printing or exporting): PostScript, EPS, DCS, PDF 1.3 and earlier, PDF/X, GIF, JPEG, BMP, and versions of TIFF that do not conform to the TIFF 6.0 specification (for example, TIFF files created with a version of Photoshop software prior to version 6.0).

In 2006 they announced a complete rewrite of their RIP technology, called the Adobe PDF Print Engine (or APPE). Spot colours (real ones) are used to be printed in a separate step and not to be mixed before to blend into CMYK.Spot colors and CMYK inks are loaded on the press in exactly the same manner. But I had assumed that you got the logos out of your control from somewhere like scanned print.PNG has been developped years ago to replace the GIF file format for use on web applications.

Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. If you regularly print or export documents that contain transparency, you can automate the flattening process by saving flattening settings in a transparency flattener preset. Granted, it could be our printer etc, but I didn't even have to select simulate overprint which many sites suggest. !That's not quite right. Except that PNG files may be suitable for print, but only on a limited base. Don't use PNG for print.You wrote that theses PNGs are logos. EPS is an old and outdated file type which should not be used anymore.

The OP's problem is usually caused the print driver's inability to color manage and flatten to page correctly.Correct, but you will have this problem with any picture with alpha chanel and this is not specific for PNG files. Lots of work, but maybe part of cleaning up these scans can be done by filters or actions if you happen to use Photoshop.I think that I am having a transparency issue with Microsoft Visio and Acrobat Standard XI. You made an error during the save operation.

Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. If you have Adobe Acrobat Professional and an image editing program, you can configure Acrobat to edit the scans embedded in your PDF using the image editing application.

It is common practice to mix spot colors (as overprints) in a two-color job in order to create a third color without introducing additional inks.The same InDesign!

).When converting spot colours to process, the graphics are rasterized for X/3, which is how InDesign/PDF handled transparency before PDF 1.6. The underlined H is from a png with transparency. PDFs are treated like paper documents in acrobat reader (and all the other readers I know of) – it will not appear transparent unless you leave it as an editable pdf and open it in Photoshop. We use PNG files sometimes on rendered data i.e.

You're talking about vector graphics against pixel graphics. It will be transparent in photoshop, but will never appear transparent in acrobat reader.

Pages that contain transparent objects have a checkerboard pattern in the pages list. I ran into the problem that my colors changed (from gray to blueish gray) in Acrobat Reader after I added transparency to a vector graphic created with pdfLaTeX and the PGF/TikZ package v2.0.

The circles are spot colours, the yellow one has a transparency. Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Suddenly prepress departments all over the world were flooded with designs that included transparency and their RIPs had to flatten this transparency to be able to make proofs or output plates.Transparency is a very complex technology. There are lots of dots and smudge marks in the doc. Although after opening my test from 2014 the PNGs initially showed as Document RGB, I had to resave and replace the PNGs in order to get the embedded profiles.Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.