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Amadís15939492
Amadís15939492
Inspiring
July 9, 2019
Question

How do I adjust dot gain?

  • July 9, 2019
  • 4 replies
  • 8171 views

Hi, a newspaper has asked me to adjust an illustration to allow a 30% dot gain. While I understand what this means and I know it has to do with colour profile presets, I don't know how to address the request. Is it possible to do this without leaving Illustrator or should I go into Photoshop? The image has no photos. Also, they are requesting not to exceed a 230% ink weight, and I am completely lost in this last part.

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      4 replies

      J
      jdanek
      Inspiring
      July 10, 2019

      If I am not mistaken, Illustrator's color setting allows 20% dot gain, so you only need to knock down the color values 10%.

      meganchi
      meganchi
      Legend
      July 9, 2019

      If you save out a pdf of your art, then you can open it in Acrobat. Use the Print Preview tool in order to see total ink coverage.

      Monika Gause
      Community Expert
      Monika GauseCommunity Expert
      Community Expert
      July 9, 2019

      You can achieve this by converting your artwork into an appropriate color profile when exporting it to PDF. In order to work well, this of course requires that your color management is set up accordingly.

      BUT: your artwork most probably is designed in CMYK (since you will be printing it). An ICC-profile based conversion from CMYK to CMYK will wreck your blacks and make them muddy.

      What kind of design are we talking about?

      Amadís15939492
      Amadís15939492Author
      Inspiring
      July 9, 2019

      Thank you for replying, Monika. The design has no real black, but I'll have to adjust the darker shade. Is there a way to precisely observe the percentage the newspaper requests? If not, which colour profile should I choose?

      Amadís15939492
      Amadís15939492Author
      Inspiring
      July 11, 2019

      A "US Newsprint (Snap 2007)" ICC profile ships with Adobe apps.

      SNAP 2007

      Or for an international specification:

      Newspaper Colour Profile Download - WAN-IFRA

      colormanagement - Download

      What I meant is one can convert from CMYK to RGB document colour modes. Then change the CMYK working space to “newsprint” and then change from RGB to (news) CMYK document colour mode. Make sure that this profile is assigned to the file, and change your CMYK colour settings back to your previous profile. You may then need to manually adjust some colours/tones to be closer to the original or to have a pure/cleaner colour build. Work on a duped file. The darkest areas of total ink will be limited by the CMYK news profile conversion.


      The colour mode and working space are different things?

      Doug A Roberts
      Community Expert
      Doug A RobertsCommunity Expert
      Community Expert
      July 9, 2019

      Amadís  wrote

      Also, they are requesting not to exceed a 230% ink weight, and I am completely lost in this last part.

      I am by no means a print expert, but this part means the combined values of CMYK should not exceed 230% (i.e. 100C + 30M + 30Y + 0K = 160% ink weight).

      Amadís15939492
      Amadís15939492Author
      Inspiring
      July 9, 2019

      Thank you, Doug! That was very helpful.

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