"Separation Preview" palette

[PimentPub]

A function is missing in "Publisher, Photo and Design", that of being able to preview the color separation as in InDesign.
A very important function before making HR PDF.

[Rabari]

A similar feature is actually available, in Photo.  It's called "Channels". If you click the Photo persona icon inside Publisher, you can also use the window to check separations inside Publisher documents. I use it all the time to check that text which is supposed to be K only isn't "rich black". It doesn't concern itself with ink densities however, so if that is important to you, it wont help.

I do wish the channels window was available "natively" inside Publisher. It's a bit tedious to jump into different ”personas”.

[Pšenda]

https://affinity.help/photo/English.lproj/pages/Panels/channelsPanel.html

[NotMyFault]

And you can use the channels mixer adjustment to create the same preview in Designer and Publisher.

If you want to check for total ink limits, this can be achieved by combining adjustment layers:

1. channel mixer adjustment which adds all color channels into one channel, but divided by 4 to keep it in the 0 to 1 range. Use K channel for example
2. now you can use the histogram, and check if any pixels are above you select limit / 4
3. to simplify this, use a second channel mixer, set offset for K to (400 - ink limit)/4
4. add a levels adjustment, set white level to 0.
5. now you get a black/ white coloring showing areas below or above the total ink limit.

it is possible to do all steps in one single procedural texture filter, with one input variable „total ink“. If interested, i can create a full tutorial and provide the adjustments as assets.

PS:

see tutorial

 

Edited November 16, 2022 by NotMyFault