Hope this helps....... I made all my chemograms in the darkroom. We need the sink area to ensure I complied with workplace health and safety policies. I also had ready access to safe lights and normal lights which was very handy. The trick to making a successful fixer chemogram is to wash the fixer off the photo paper BEFORE it goes into the developer. If not, the developer will become contaminated very quickly and loose its ability to work on the photo paper. Once the fixer chemogram is in the developer, you need to remove it as soon as the desired effect is achieved. Wash off the developer as quickly as possible. As long as the developer is in contact with the silver halides in the paper, they will keep on developing until it is removed. One of my biggest tricks when working with developer and fixer chemicals is to prepare them with warm-hot water. The heat makes the chemicals react much, much faster with the silver halides in the photo paper. The only drawb