I copied a couple of images in my sketch book. The one on the left was drawn with a litho crayon and I tried the soap on the right.
Next I poured on the cola. The acid in the coke reacts with the soap and litho crayon and etches the foil.
After wiping off the cola, oil is buffed down onto the plate.
Here are my plates rolled up three times with etching ink. I wiped the plates with a clean wet rag between each roll. You can see than I almost completely lost the other mushroom I did with the soap. Finger prints will easily etch too.
The printed result. I put the plate through my press but the video shows that is possible to print solely by rubbing with the back of a spoon.
Close-up. You can see the wrinkles of the aluminum foil and I couldn't seem to "clean" my white spaces fully.
Example of paper lithography which can hold a lot of detail but is very labour intensive.
I hope you enjoyed this photo essay of this process and if you give it a try yourself, I would love to see your results. As for me, I think this technique has great potential if I'm willing to work out the kinks. Maybe a heavier foil would print cleaner?
I do love the fact that it's another printmaking process that I can do at home for very little money. I had to laugh when a viewer commented that they were feeling ill to have spent twenty-thousand on their art tuition. Me too. It's all been in our cupboards!