It’s easy to convert a color image to black and white in any photo editor, Lightroom included, but to get a strong black and white look you often have to do a little more besides. Here’s a look at the B&W mode, B&W panel and the Tone Curve.
Tone Curve (Lightroom)
This is just another name for the Curves tool found in most photo editing applications. 'Tone Curve' is probably a better description of what this tool does and it's how it's described in Adobe Lightroom.