A raw piece of imagesetter film behind glass or acrylic and in front of a white background would probably look pretty cool (great contrast), although you'd have

A raw piece of imagesetter film behind glass or acrylic and in front of a white background would probably look pretty cool (great contrast), although you'd have some mechanical challenges getting it mounted without bubbles. It may require a fairly thick piece of glass to get enough pressure in the center, and it may require a bezel so you can clamp/glue it to the backing securely.