What Is Best Way To Make Black and White Print?

[Krikor]

I tried to follow the instructions in posts #2, #3 and #5, and the best results I got were:
1- #2
2- #5
3- #3
   

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I believe that the tips from rich2005 and Ofnuts in the posts below would also give excellent results!

#2 - https://www.gimp-forum.net/Thread-removi...0#pid15370

#3 - https://www.gimp-forum.net/Thread-removi...5#pid15375