How to maintain a grayscale image (1 channel) output in a cmyk layered file that contains a color layer?
Thanks in advance for your help!
I have been asked to fix a customer supplied ad targeted for CMYK newsprint. It is a .psd doc.
The printer has asked that the file be supplied with the background image, which is separating as rich black, be created in 100% K as it is offsetting, and will offer better registration, etc.
This would not be a problem except there is a two color build yellow logo mark and type on the file.
When I bring in the background image as a grayscale file and flatten the file, the grayscale background image reverts to separating into cmyk again!
Is there a trick in photoshop to maintain the one channel K background and still have the color logo and type on an upper layer separate as such?
If I understand correctly, your assets are:
- CMYK logo
- Grayscale image
This is what I would do
- Create an empty CMYK PSD file
- Copy your grayscale image
- Open the Channels palette. Windows->Channels
- Click on the
Blackchannel (the last one) and paste your (previously copied) grayscale image. This pastes it ONLY in the K layer, so it will be rendered with only black ink.
- Click on the CMYK channel (at the top) to continue working with all 4 channels, as one normally does
- Continue with your workflow (bring in your CMYK logo, etc)