We tried to use Affinity Photo to create a printing file and somewhere in that process we need to do a selective colour adjustment. We have been doing this in Photoshop before and noticed that we would get a very different outcome when using the same values in the adjustment. I've attached the afphoto-file, the outcome of that ("MöhreMakroTest.tiff") as well as the desired outcome ("M10.tiff").
The values used in the adjustment are
Reds: -100, 25, 75, 0
Yellows: -100, -100, 100, -100
Greens: 50, -100, 50, -25
Cyans: 0, -100, 0, 0
Blues: 0, 0, -100, 0
Magentas: -100, 0, 100, -25
Whites, Blacks and Neutrals remain unchanged.
Also creating Macros is not very well done so far in my opinion. Besides from missing some options to for example delete a recorded step, there seems to be a bug: When setting many adjustment parameters (as done in selective colours) one is not able to view them in the Macro Studio, because there is simply no way to scroll and it gets cut off at the top.
Bonus question: We we're not able to create a spot channel for white highlights and as a workaround set a global white spot colour with overprinting. Does that make any sense?
Oh and a final thing: The tiff-files from Photoshop all were in the range of 50MB, the one we did with Affinity ("MöhreMakroTest.tiff") is way smaller. Any explanations for that?
Any help is very much appreciated, thank you!