P030 → Mixed Ink Research
I have found some examples as references. In this video, she compared different outputs by using different portions of mixed ink (acrylic and soap or glue), which is quite helpful for my experiment.
https://www.instructables.com/DIY-Scratch-Off-Business-Cards/
On this website, the guy showed another DIY ink mixed with soluble paint and washing up liquid. ( I tend to buy scratch ink before, but it’s quite expensive and the colour is dark, so I decided to mix on my own for a better colour.)