I have been interested in the process of Gumoil Printing, a very unique way to make a photo. I will post examples here as I do them. In my quest to learn more I found a video on youtube of Karl Koening giving a demonstration. Watching the video you can learn a lot but not everything. I went to buy his book, but their is a small problem. It is no longer printed and people are selling used for $500. To me that is just crazy. The other problem is that Karl passed away a few years ago so it is hard to ask him any questions. He was very good at responding online. I was able to get my hands on a copy of the book and I scanned it in for everyone else that wants to learn. I hope it helps.