You can have your black and white photo printed on any Pixum pictures. However, it would be a particularly good idea to have them set on aluminium dibond, since the surface of this material is dull. Reflections, which could interfere with the contrast ratio, are thereby eliminated. Alternatively, you can opt for the Forex plate if you need a very light material due to the nature of your walls.
Decoration tip: If you have several black and white images that match your style or theme, you can also print them as a picture in a frame. Use a black frame (for example, "Classic Black"). If you choose different sizes, you can present your pictures in a nice and elegant fashion, e.g. in the Petersburger hanging style or in a gallery-like style.