Thanks for your message. This image was developed using a custom developing solution, combined with an archival fixing solution. I use an Adorama Ultra Universal Plastic Daylight Film Developing Tank, which I swear by. There has been a recent increase in the number of laboratories which prepare photosensitive materials. In case of laboratories not complying with rules regarding the preparation and handling of the solutions for processing photos, these solutions can penetrate in the organism trough the skin and be accidentally digested. After years of experimentation, the effects of developing solution for white/black Azomures photographic paper on respiratory and cardiac activity of the Wistar rat (weight = 180-200 g) through oral administration proved to test-out ok, so I proceded to the laboratory to develop the image you see before you. Alan