Here is an image of Tiffany I wanted to convert to black and white:
Quite often I will run the the One Penny preset (available from Flypaper Textures) in Nik's Analog Efex Pro 2 for a semi-black-and-white effect:
This interesting preset actually uses three Flypaper textures to get this look. But I was looking for a pure black and white, so I discarded the One Penny layer. Instead, I processed the color version into a black and white image using the Fashion Magazine 1 preset of MacPhun's Tonality CreativeKit:
Curiosity then got the best of me. What would happen if I ran the One Penny preset on this black and white version instead of the initial color version? Here is the result:
The final result is more appealing to me. Those three Flypaper textures applied by Analog Efex Pro 2 add a certain richness. This combination (Tonality CK followed by Analog Efex Pro 2) is a workflow worthy of further investigation.