Hello! I'm a design student in college and I have a project in which I desperately need help of people that actually understand chemistry.
The project consists of recreating a poster, so recreating an image, by the means of a reaction. For example burning wood, or making rust appear in metal in specific areas, for it to create the image of the poster. As those have been made by some classmates, I need to figure out something else. I'm attaching the poster here, it's what the reaction needs to look like in the end.
No matter how much I research, I can't figure out what to do. I can find multiple reactions that can be done at home, but none which I can actually delineate before hand, and so, control the final shape it will make. I desperately need suggestions of anything you can think of. It can also use fire or water or whatever else.
It doesn't need to be something overly simple or overly complicated as long as it achieves this specific result. And please bare in mind that I'm inexperienced, it needs to be something I can have access to, and not lose a finger while doing at home. I'm sorry if I'm asking too much, and thanks.