Thinking about my previously found algae, I am also intrigued by the natural dyeing.
That amazing process is stunningly beautiful. And the beauty is in unpredictability of that organic changes.
By using a different mordants we can achieve quite different results. Mordanting is so important to make a fabric more sensitive for a absorption a new colour.
When I need more dark colours I usually use more iron in my dyeing experiments, when I need more greenish I focus to use more copper solution.
Some different method is metal oxidation for fabric dyeing process. The best results are with copper as a verdigris and iron as a rust.
We are also able to manipulate the strengthens of thats processes, using hydrogen peroxide, salt, acids etc.
Copper oxidation dyeing.
Natural dyeing process