Layer order matters
In gum bichromate, print layer order actually does matter sometimes. In this demonstration, I printed the same image with the same pigments but with different layer order to show how much that one variable can change your image.
Cyanotype vs. blue gum
Many gum printers use cyanotype as their blue layer. I printed a side-by-side comparison to show why I prefer cyanotype.
Pre-shrinking paper
Pre-shrinking your paper in alt process contact printing can help maintain registration. I walk you through how to do this step-by-step.