Problem: Thin Lines only showing when printing

[sandoz]

Hello!

 

I am getting a problem with thin lines showing up when I print this file. They only show up in this file. Photo of problem and affinity file attached.

The printer is otherwise acting normally and these lines show up in no other document, affinity or otherwise. 

Help!

line flaws.afdesign

[NotMyFault]

It probably depends how you print (from Affinity directly, or exporting and from another app). I would advise to flatten the document before print (merge visible).

It is probably caused by the brushes used.

[sandoz]

Thanks NMF! That did the trick.

Wonder what is going on under the hood. Rounding errors due the complexity of the brush templates? I was using included brushes with little to no modifications.