overprint fill black transparent Printing in Illustrator

If you have set the black to Overprint, it will be used during  the creation of separations. When you print on a color printer you need an option to Simulate Overprint.

To avoid this, don't use Overprint, but use Darken blend mode for the black object in the Transparency panel.

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.

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