Newsprint filter or other method?

[denzjos]

There are a few solutions for this issue and this is also one :
1 - If you want lines under a certain angle rotate the image first  (Image / Transform / Arbitrary Rotation)
2 - Then use :  Filters / Distorts / Engrave  
3 - Then smooth the result using : GMic-Qt / Repair / Smooth (Antilias) Amplitude 73, Edge Threshold 50 , Smoothness 2.5
If needed, use the Qt-GMic filter a second time with the same settings (or use different settings)
Original :
   
Result (zoomed out) :
   
Detail :