Lucia,

Welcome to the site!

By BADGES I believe what you are referring to is KEYWORDS. Badges in Aperture are actually something unique; check out this post to see the terminology: Badges. Or, “What Are All Those Funny Icons, Anyway?”.

(I’ve updated the title of your post to clarify for others searching this forum)

Removing keywords is easy or mildly complicated, depending on how you want to do it. If you just want to remove ALL keywords from a series of images, that’s really easy. If you want to remove just a single keyword, such as “duplicate”, it’s a few more steps.

THE EASY WAY

First you need to find all the images that have this keyword, then you need to erase all the keywords from those images.

To find the images, you 1) Select the Photos view to see all photos at once, 2) open the search window, 3) enable Keyword, and 4) check the keyword(s) you’re searching for. See [screenshot]

Once that’s done, select all the images and go to the menu MetaData > Batch Change and from there 1) choose the Metadata set “Keywords”, 2) make sure “replace” is selected, 3) turn on “keywords” and it will display “clear values” [screenshot], then 4) click OK.

This will wipe out ALL keywords for that particular selection.

THE ADVANCED WAY

If that won’t do what you need, let me know and I’ll detail instructions for the more advanced way. But essentially you’ll still do a search for the keywords as above, then instead of erasing from all, you’ll create a button set, add the “duplicate” keyword to the set, then option-click the the “duplicate” button to REMOVE it from all images.

Again I’ll put that together with screenshots only if you need it.

cheers
-Joseph @ApertureExpert