Results 1 to 2 of 2
  1. #1
    Member HomePhotoshoppingNetwork's Avatar
    Join Date
    Jan 2013
    Posts
    79
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Convert to profile using custom CMYK/maximum black

    This is a way to convert a file to CMYK and have things that are black in the original file convert so that they are only on the black plate. I use this for times when a customer sends the newspaper I work at an ad as a JPEG in RGB and I want the black text in the ad to only appear on the black plate. Black text on all 4 plates would not be a good idea with newsprint printed on a web press. It also works well when someone sends us a pixel based logo that's RGB that has black elements that would print best if they were only on the black plate. This can also be used to convert a CMYK image that has black text that appears on all plates so that it is on the black plate only.

    The only thing to look out for (in an ad that is sent as a JPEG) is that this method can put a bit too much black in the lighter tones of any images that might be in the ad. We had an ad for a local hospital that was sent as an image rather than a PDF with fonts, vector objects, etc. When I used this technique to convert it, the doctor in the ad came out too dark. This can be corrected by tweaking the black channel.

    Here are the steps

    Step 1: Convert to profile (this works if you're in RGB or CMYK).


    Convert to profile using custom CMYK/maximum black-step-1.jpg





































    Step 2: In Convert to Profile dialog box, click on Advanced.


    Convert to profile using custom CMYK/maximum black-step-2.jpg





















    Step 3:In Convert to Profile Advanced dialog box choose Custom CMYK for the CMYK profile.


    Convert to profile using custom CMYK/maximum black-step-3.jpg































    Step 4: In Custom CMYK dialog box, choose Maximum for the Black Generation setting.


    Convert to profile using custom CMYK/maximum black-step-4.jpg























    Step 5: OK everything and make sure you embed the profile when you save the photo. Also make sure not to convert the file to your working CMYK color space if you open the file in Photoshop again. You should get a profile mismatch warning when you open the file and you need to use the embedded profile instead of your working CMYK.

    Let me know if any of this is confusing.

  2. #2
    Member HomePhotoshoppingNetwork's Avatar
    Join Date
    Jan 2013
    Posts
    79
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Convert to profile using custom CMYK/maximum black

    Just to be absolutely clear. This is what the above mentioned ad sent as a JPEG would look like when converted to CMYK using Image>Mode>CMYK. In this example the black channel is turned off so you can see that the black type is showing up on the CMY channels.

    Convert to profile using custom CMYK/maximum black-screen-shot-2013-02-03-5.07.42-pm.png














    This is what the same ad would look like using the maximum black generation trick (black channel turned off as in above example).
    Convert to profile using custom CMYK/maximum black-screen-shot-2013-02-03-5.08.40-pm.png

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
About Photoshop Gurus
Photoshop Gurus (PSG) is a friendly community of designers and artists who enjoy all things related to Photoshop. PSG can consider itself one of the oldest Photoshop sites and has recently had it's 10th anniversary. We've come a long way and have every intention to continue supporting the Photoshop community. Photoshop can be an overwhelming program for beginners and that's how we try to help. We have a friendly forum, tutorials and all resources to help you understand this wonderful program. Feel free to look around and if you have any questions, don't hesitate to ask. Happy browsing!