The most effective techniques for converting images to black and white (Video)

The most effective techniques for converting images to black and white
Additional info to enhance your digital negative for cyanotype!
This video will show how to do the selection or only target area you want to have adjustment or when you need to fix the lighten or darken in some area on your photo before you convert to negative file for cyanotype.

​For Cyanotype negative, You can skip the color balance option because we need only black and white for making our negative file.