If you’re browsing the internet looking mixed colors turn black indesign pdf a solution to an over printing problem, this might be the page for you. What do Over Printing Problems Look Like? Have you ever sent artwork to press that looks perfect on-screen, but dreadful in print? For example, when areas of solid black allow images behind to show through?
This happened to me a couple of times before I got to the bottom of the problem. These allow you to spot potential over printing problems before they become expensive! Here I’ll simulate a few common over printing problems and explain how to avoid them. The above example shows an A4 document created in Quark XPress 6.
The image behind ended halfway up the page. I then exported the file as a PDF file. Overprint Preview” is turned off. As you can see, the image shows through the black block because the default Quark setting for black is ‘overprint’. This means that the Cyan, Magenta and Yellow plates are printed first, and then the Black plate is “overprinted” on top, allowing other inks to show through. How do I fix this over printing problem in Quark XPress? There are a number of things you can do to fix this issue.
First, you could change the “Trap” settings in the color palette. Select Black and click Edit Trap. Select all colors in the list, click on the Trap dropdown menu and select “Knockout”. This will ensure that the black literally “knocks out” the other colors wherever it appears. To avoid over printing pitfalls, probably a safer thing to do would be to make sure that the objects don’t overlap in the first place. I always prefer nice round numbers! The black won’t print over the image because the image is no longer beneath it.
It’s usually fine for black text to overprint because it’s very difficult to tell if there’s any show-through unless it’s a very large, blocky type face. This is because on the face of it the image is ‘showing through’. In reality of course, it’s because the inks that made up the image have mixed themselves with the black to make it darker. This has created a accidental, multi-tonal ‘rich black’.