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El Commodore
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Why does compound path appear lighter than original?

Jun 24, 2013 1:09 PM

Tags: #illustrator #problem #mac #compound_path

I placed text on a shape and outlined it. As soon as I create a compound path, the result appears lighter than the originally outlined text (on screen and printed), although the paths seem to be identical when I overlay them. Same happens when I divide the paths.

 

Any thoughts appreciated.

 

compound path test 01.jpg

 
Replies
  • Currently Being Moderated
    Jun 24, 2013 1:50 PM   in reply to El Commodore

    Text is generally treated dirreferntly than paths.

     

    You could keep the text live by using a compound shape instead of a compound path.

     
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    Jun 24, 2013 2:10 PM   in reply to El Commodore

    As per your description, I think you have already outlined both text objects.

     

    I can see the same difference at certain zoom levels in Illustrator CS5, so I guess it's just a matter of one of the various imprecisions on screen. A speciality of Illustrator.

     
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    Jun 24, 2013 2:16 PM   in reply to El Commodore

    What printing machine are you using?

     
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    Jun 24, 2013 2:27 PM   in reply to Kurt Gold

    Since the text is a path... are strokes applied to anything? A text stroke (perhaps white) will disappear when made into a compound path with the rectangle. The rectangles stroke (perhaps black) will be applied to the text when the two are combined into a compound path.

     
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    Jun 24, 2013 2:37 PM   in reply to [scott w]

    Scott,

     

    looks like you're answering to me. But no, there are no strokes involved. Try it, at certain zoom levels you will most likely also see differences on screen, just as Commodore described.

     

    I'd still say that it is just a screen issue. Just did a quick test print on a HP Color Laserjet 5550 and a CP 4520. No difference at all …

     
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    Jun 24, 2013 2:40 PM   in reply to Kurt Gold

    Yup. I see it here now. It does look like an on-screen issue perhaps due to anti-aliasing.

     
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    Jun 24, 2013 2:47 PM   in reply to El Commodore

    Commodore,

     

    If the text has a stroke, as it seems (it is thicker in the left image), that stroke will get the colour of the stroke of the rectangle if any, and otherwise the fill colour of the rectangle, whereas the fill colour of the text will be changed to None (so a background will show through. The Fill colour of the rectangle is unchanged as is the Stroke colour if any.

     

    At least it ought to work that way.

     
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    Jun 24, 2013 2:52 PM   in reply to Jacob Bugge

    Jacob,

     

    there is no stroke. That's already been clarified.

     

    Commodore,

     

    I have no Canon Pixma, but – as already mentioned – I cannot reproduce your printing issue when using the above mentioned printers that I used for a quick test.

     
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    Jun 24, 2013 3:06 PM   in reply to Kurt Gold

    Kurt,

     

    I just realized that I had misread lighter as paler rather than thinner.

     
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    Jun 25, 2013 2:34 PM   in reply to El Commodore

    Have you already measured the objects in Illustrator, Commodore?

     
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    Jun 26, 2013 9:05 AM   in reply to El Commodore

    By measuring I mean to check if both outlined text objects have the same dimensions.

     

    If that applies, I'd still vote for a screen issue only …

     

    You could provide the .ai file here, so one could take a closer look.

     
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    Sep 27, 2013 2:06 PM   in reply to Kurt Gold

    I would agree with this thread completely, the vectors are the same, no stokes, but it shows, and prints differently. I have printed on on an EFI Fiery and litho with the same result. To me it looks like an auto trapping issue (i.e. a straight vector traps one way a compound the other) I just can't see a way of controlling it.  Simon

     
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    Sep 27, 2013 4:47 PM   in reply to El Commodore

    The discrepancy is caused by the pixel resolution of your printer.

    The lower the resolution the more noticeable it will be.

    This is because, in the compound version, an extra pixel (a sort of anti-aliasing) is added to the black around the ‘hole’.

    It is usually o.k. for high resolution (offset) printers, less so for ink jets.

    One should generally avoid compound paths with very small ‘holes’ which have a tendency to fill in.

     
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