Black and white photo paper, generally, consists of a paper base, either plastic or fiber, onto which a light-sensitive silver nitrate coating is poured. Once the paper is exposed, developer washes off the unexposed silver, revealing the image. When the paper is fixed, the remaining silver is washed off, allowing the photo to become light-safe. For a successful black and white print, it must be fully developed and fixed.
My favorite thing about alternative processes within film photography is that nothing has to go right. You will still receive results regardless of what you do, what steps you adhere to, etc.. Lumen prints are a part of this process; they involve exposing the paper to UV light, and putting it directly into the fixer. Depending on the age of the paper, the conditions it was stored in, the type of paper, etc., the paper will turn an array of colors. These are examples