Creating Non Photo Blue

[inknoir]

So here's the thing. I ink comic books. I love affinity designer, and have affinity photo on both my Mac and iPad Pro.

I have a simple thing that I can not figure out. how to change a greyscale pencil drawing (or RBG) to a blue line so that I can print it out. I have half a dozen ways to do this in photoshop but I want to get rid of that beast.

Once pages are inked I need to be able to scan and clean up the art, removing the non photo blue, leaving only the pure black of the ink and the white of the paper.

Any suggestions?

Thanks in advance

P

[toltec]

Take an image

Add a solid blue fill layer on top

 

 

Change the layer blend mode to Add

 

And get this

 

 

However, a scanner will still pick it up, it is not like orthochromatic film. Scanners see all colours.