If you shoot some dark darks (what a fun thing to say,) be it on your camera or editing them in post-production, you can be able to make the whites stick out more.
When shooting black and white, the darks can never be too dark in most cases. If you shoot some dark darks (what a fun thing to say,) be it on your camera or editing them in post-production, you can be able to make the whites stick out more. In fact, the whites and the grays will pop even if they are weak.