How to create K-only art?

[waltonmendelson]

Is there a way to create K-only art? That is only K has values from 00 to 100.  Middle gray would be C00 M00 Y00 K50; 100% black would be C00 M00 Y00 K100; etc. 

 

Walton

[waltonmendelson]

I should have added, this should read as K-only in a PDF.

 

Walton

[walt.farrell]

Have you tried:

1. Creating a CMYK document.
2. Setting the color to K-100 Black.
3. Then never change the Color, except by changing the Opacity.

[waltonmendelson]

Thank you . . . yes, I set up a file in CMYK.  I set the color to C00 M00 Y00 K50 and made a swatch of middle gray.  Yes, when I check the result, the PDF is C00 M00 Y00 K50.

But how to convert (I should have said convert, my bad) existing images to K-only values? 

Walton

[walt.farrell]

1 minute ago, waltonmendelson said:

But how to convert (I should have said convert, my bad) existing images to K-only values? 

If your existing image is JPG, TIFF, or PNG: Try creating a new document (CMYK), and Placing the old image into it. Then you should have a K-Only button on the Context Toolbar.

[waltonmendelson]

A big thank you!  I never saw the K-only button.  In Photoshop, this is quite a bit more involved.  Bravo to Affinity and, again, a big thanks to you, Walt.

 

Walton