FULL TUTORIAL: http://photography.tutsplus.com/tutorials/how-to-use-colour-balance-for-advanced-black-and-white-conversion-in-adobe-lightroom--cms-25646?utm_campaign=yt_tutsplus_zvviC2gJryo&utm_medium=referral&utm_source=youtube.com&utm_content=description
It’s often claimed that white balance has no bearing on black and white images. Many basic tutorials recommend using your camera’s automatic white balance because any moderately accurate white balance is fine for an image that is going to be converted to black and white. This is simply incorrect!

Adjusting an the white balance of a digital image is an incredibly powerful way to controlling how Adobe Photoshop Lightroom interprets the colours in your image when you convert to black and white. In this tutorial you'll learn how to do just that.