PDF has differet anti aliasing in pages

newone's picture

Hello, I am new to InDesig and to this forum, and I have a question.

I just started making a document in InDesign with pictures and text, but the thing is, when I export the project to PDF, in some pages the text is displayed in the proper color, while some seem to be "lighter" although the same exact text settings are applied to both texts. this also happens to the text which is merely continued (with the red +). It is black and ok in the first page, but when it continues on the next one, it is lighter. You cannot see the difference when the text is printed, but this time I really need to have the pdf version as well.

Thank you

Frode Bo Helland's picture

Are you working with a colour profile? Do you have any effects applied to the pages in question?

Joshua Langman's picture

Ah! I think I've got this one.

Possible cause A. Is your text that looks significantly darker closer to an image than the other text? (That would explain it being slightly "heavier.")

Possible cause B. Are you using more than one "black" swatch, or maybe the [Registration] swatch in InDesign? (That would explain it being slightly "darker.")

Cause A would be because text that is under transparent portions of images is rasterized. Cause B would be because "rich black" looks darker in PDFs than "pure black" and sometimes prints that way, depending on the printer etc.

Go to InDesign preferences > "Appearance of Black" and make all blacks appear accurately. Can you see the problem in InDesign?

JamesM's picture

When I'm having an InDesign problem I can't solve, I try a process of elimination. Make a backup copy of your file; then take a couple of pages where you're having the problem and temporarily delete every object (photos, rules, background tints, etc) except for the text boxes. So you just have the text boxes and nothing else. Then see if you're still having the problem. If this fixes the problem, you know some interaction with another element is causing the problem.

newone's picture

Thank you for your comments guys. I tried changing the appearance of black. That didn't fix the problem. I tried moving around some pictures (I have pictures or shapes on top of some pages) and it did change the color to darker, when ever I placed a picture on top of the page. So, Joshua, I think it's Case A. Any suggestions how do i solve it so everything looks the "same black" in pdf? Big thanks!

p.s. When I delete the image from the page, I can visually see that there is a change in the text (in InDesign when zoomed out, I delete the image, and the color of the text lines turns from light gray to dark gray). So this is definitely connected with the images.

newone's picture

I was playing around and found, that adding transparent text or a transparent box somewhere in the page, makes the text turn out darker in the PDF.

newone's picture

Ok, so sorry about the spaming. I came up with a solution (probably not the best way to do it, but it works). I just added a dot (with transparency set to 0%) at the Master pages. Now every page has a transparent object, so the text in every page will seem "darker". If you have a different solution, please do tell me.

Thank you all.

Joshua Langman's picture

That's clever. Or, you can just make sure that all your text is on a layer above all your images, which I believe should also work. (Although then you might have to worry about trapping …)

JamesM's picture

I'd go with Joshua's suggestion of putting the type on a separate layer. In fact I know some designers who do that routinely as a precaution against various problems.

It's pretty easy to do. Open the Layers palette and create a new layer and name it "Type". Then with the palette still open, click on your text boxes to select them. (If your text boxes appear on your master page, you can do it there rather than on each individual page.) In the Layers palette a little box will appear on the right side indicating which layer those objects are on. Drag that little box to the Type layer.

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