BofG

Printing directly there's no solution, but exporting first to a pdf and maintaining your specified CMYK values can be done. You have to set up the document in the profile you want to finally export to, and then use one of the 'PDF-X' types to export to, ensuring the export profile is set to match the document. The whole thing is annoyingly opaque, there are lots of ways it could be improved.

I have to admit I don't have Publisher, but I know it's possible to export to a pdf with mixed colour profiles (e.g. the general content can be FOGRA, but your images can still be using an RGB profile). Whether there is direct control in the app I'm not sure, but you could convert the images prior to placing them in the file. You do have the option in the pdf export setting to either convert the images or leave them in their own profile, depending on what 'type' of pdf you create. Are the images in sRGB? What export settings are you using for the pdf?

How are you handling the colour profile of the images when importing into Publisher?

Vectors inherently have a direction to them, easy way to see is to add a stroke to the shape and put an arrow type end style on it. The fill mode is calculated based on the direction of the vectors involved. If you was to flip that middle vector before subtracting it you will see it behaves differently.

Did you try "even odd" as well? Before deleting anything, so set it just after doing the boolean operation.

It could well just be the fill mode, try changing to "non zero".

Not automatically, no. InkScape has a pretty good tracing feature.

The Android vector asset, as it's name suggests, requires a vector format. You have two pixel layers, so you will get pixel data in your svg file. Your options are to either start from scratch and draw that image as a vector, or use a bitmap tracing program to convert it (which is what you had done from the png you mentioned in your earlier post).

Is that the source document you are exporting to svg from or is that the exported svg opened in Designer?

Affinity isn't great for creating svg files, there are lots of things (blend modes, layer fx etc.) that result in it just outputting a raster image wrapped in the svg container. Can you post a screenshot of your layers panel with all the layers opened?

Could you perhaps use the colour picker tool, set it to sample a large area and then read off the rgb values? That would give you an idea of the overall colour at the sampled area of the photo.

If you search on here for "lines in print" there are a few people with some issue like that, no definitive solution that I can see. Maybe post in those threads and see if anyone has ideas to help.

The reason for asking for the actual Designer file (ending ".afdesign") is because there are many things that can influence the output, and it's easier to tell what's happening by seeing the file rather than going back and forth trying to guess. If you don't want to share the file for ownership reasons, just make a new one with placeholder content and check that it also prints badly, then post that one here.

Can you post one of the Designer documents that you are having this issue with?

Well, actually it's probably not..... I didn't read your first post correctly, I thought you was switching between documents. If you have both artboards in one document then they are both using the same colour profile. If you really need two different colour spaces then you need two different documents. A better approach might be using a single sRGB document with just one version of the poster and then soft proof layer for your CMYK profile which you can toggle to see how it will look. You can then apply the appropriate profile on output.

In the colour panel, just to the left of where you set it to cmyk/RGB for the sliders, there is a small padlock icon. Click that to turn it off, and then the panel will switch automatically to whatever format the selected object was last set using.

If you open your pdf in Designer what do you see?

Layer blend modes also cause it, even those types which are supported natively in SVG.

Yep Illustrator can do it, Object > Path > Simplify (you can run it multiple times if needed). You could also try svg omg, save as svg from Designer and run it through https://jakearchibald.github.io/svgomg/ There are online free converters that can take an SVG and output a DXF. Might be worth a try if that's all you are paying for Illustrator for.

That's what does it, unfortunately that functionality in Designer is very clunky. You will have to use some other software to reduce the nodes automatically, Designer doesn't have that kind of function. InkScape can do this, it's free software but it's a bit painful to use. The function you need is referred to as 'simplify'.

That looks perfectly sensible to me, again though the printers are the ones to ask - that setup will have ICC RGB colours in the document, and the FOGRA profile in the output intent. Some places prefer "device cmyk" in the document, which you would get by converting the Designer document (or ideally a copy thereof) to the FOGRA profile via document setup, colour tab prior to exporting, you can then leave the profile "as document" in the export settings.

Turns out that wasn't very far!

As far as I know, all you need do is drop them in the folder like you have done. Did you close and restart Designer? Failing that restart the computer. When you do get them working, you might want to consider using an sRGB document and applying those profiles at export time to an X-4 pdf. You can use a soft proof adjustment layer whilst working to see the output. The uncoated version will be a much smaller gamut than the coated one.

The best thing you can do is ask the printer. If they supply you with ICC profile(s) to use for output, you can use them in a soft proof adjustment layer so you will see on screen more accurately what will come out (provided your screen is decently set up).