These are shirts I sewed and dyed on one sunny afternoon some years ago.
The open collared shirt was folded into a small triangle shape first, then it was dyed with two pieces of triangle-shaped wood sandwiching the shied and tied with a string around the whole thing to secure the bundle. It produced an interesting patterns, and I liked it! (This shirt is made with Butterick B5261 pattern designed by Connie Crawford.)
The sleeveless pull over shirt was dyed without any tying. However, it still had nice random patterns.
I should have tried some more dyeing this summer! Now it feels a little too cold to be working with water outside.