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Adjusting amount of Cyan in an image?

Discussion in 'Gerber' started by BlueFishDesigns, Sep 9, 2008.

  1. BlueFishDesigns

    BlueFishDesigns Very Active Member

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    Aug 21, 2006
    Huntsville, AL
    Is it possible to adjust how much Cyan is printed in an image? I'm trying to print an image of a mug of beer and after trying several settings, the Yellow keeps coming out a little Green. I tried telling it to print the Cyan last so I could possibly just not print the Cyan but then the Magneta parts came out too Red. I thought maybe I could adjust how much Cyan to be printed but can't seem to figure out how. Maybe there's a way in Photoshop to do it? Another thing is, tho, while it looks great on the screen, that doesn't necessarily mean how it will look when it prints so I'd have to keep adjusting, print a test, adjust more, etc. Any suggestions?
     
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  2. GK

    GK Very Active Member

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    Apr 30, 2007
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    In Photoshop its under Levels.

    Image < Adjustments < Levels, them adjust the Cyan channel.
     
  3. BlueFishDesigns

    BlueFishDesigns Very Active Member

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    Aug 21, 2006
    Huntsville, AL
    Maybe this will help show what I mean. :thankyou:
     

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  4. Fred Weiss

    Fred Weiss Merchant Member

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    Sep 11, 2003
    Olympia, WA
    You have to go back to Photoshop to actually reduce the cyan but it probably isn't the issue. More likely it is the color profiles being used that is causing the color shift.

    In GSPPlot, 123 dialog, turn off the automatic color selection and manually select the output profile named "Gerber Edge II 300 DPI CMYK" to see if you like the result.

    If that doesn't do it go back and see which Source Image Color Profile you are using in your image controls in Composer. If it is set to Gerber [GSP] Internal Working Color Space, try a different Source Image Color Profile.

    If necessary, go back to Photoshop and look at which color profile you have assigned to the image and choose a different one. I find that the sRGB IEC61966-2.1 color profile gives me very acceptable color output. If you choose that then also choose it as the Source Image Color Profile in Composer. Then use the Gerber Edge II 300 DPI CMYK output profile in GSPPlot when you print it.
     
  5. GK

    GK Very Active Member

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    NYC
    this is with no cyan. you lose some depth of the colors because of the 0% cyan. I would check the profiles you are using to print first.
     

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  6. BlueFishDesigns

    BlueFishDesigns Very Active Member

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    Thanks so much you guys! Tried doing a few things of what you each said and got a great print. Fred, you are a GERBER GURU! Thanks for all your help! :thankyou::U Rock:
     
  7. Fred Weiss

    Fred Weiss Merchant Member

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    Sep 11, 2003
    Olympia, WA
    [​IMG] Glad it worked out.
     
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