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Participant
July 30, 2021
Question

Positive/negative stroke dilemma

  • July 30, 2021
  • 5 replies
  • 755 views

Hi everyone, I'm preparing a logo for print and have found a frustrating dilemma. The logo consists of a white square with a central outlined star in dark blue. It will screenprint in white on a dark blue base material (so the star outline needs to be reversed out of the white block). When I set up the artwork for visual purposes, the star was a dark blue outline on the white square. To set it up for print, I outlined the stroke and used 'pathfinder' to reverse it out of the white square (so essentially the positive line became a negative space). As soon as I did this, the line ppeared much thinner - and even more annoyingly, printed out thinner too. What's going on and can anyone help?

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5 replies

pixxxelschubser
Community Expert
Community Expert
July 31, 2021

Hi @Annie Baxter 

try to use a opacity mask or a knockout group instead. That should give you the same "width".

Ton Frederiks
Community Expert
Community Expert
July 31, 2021

It is caused by anti aliasing and is visible on low res devices like your monitor screen or your desktop printer. High resolution devices like printing presses won't show this. The same is true when a different algorithm is used for anti-aliasing.

An image export with Type Optimized will show it while Art Optimized will not show a difference.

Another way to solve it for low res devices is to use an Opacity mask instead of a clipping mask.

See:

https://shared-assets.adobe.com/link/f1eff71d-0274-4777-6864-3ee65370d8f3

 

Participant
July 31, 2021

Hi, I'm using v23.5.1

It is tricky to describe, so I'm sharing an example. It seems kind of pedantic to want to create a reverse/negative space for print, but it really helps when designing and printing with spot colours.

Brad @ Roaring Mouse
Community Expert
Community Expert
July 30, 2021

I can't reproduce your issue, based on your description.

Make sure your newly-created shape doesn't have a stroke applied. If your background square had a stroke, it would transfer to the new shape cutout as well.

 

Also: You can do this a diiferent way.

Instead of using Pathfinder, after you convert the stroke to outline, select that shape and your background square and make it a Compound Path.

Kurt Gold
Community Expert
Community Expert
July 30, 2021

Which version of Illustrator are you using?

 

Also, I am not quite sure if I understand the issue as per your description.

 

Can you share a sample Illustrator file or at least a sketch that may explain what you are looking for?

 

Participant
July 31, 2021

Sorry - that's v25.3.1 (long day!)