Maple leaves are high in tannins and so are well-suited to the eco-print process. Tannins help natural dyes bond to fabric and often also impart colour. Tannin levels increase over the growing season. So maple leaves picked in autumn will print more vividly than those picked in spring.
The different sides of maple leaves produce quite different effects. I like the delicate details of the sky-facing side of the leaves.
But the earth-facing side will print the most colour and be more colourfast.
These samples were printed with the method described in my ebook. I soaked the leaves for a few months to get rid of excess tannins, which bleed when combined with the iron mordant. The soaking process helps produce clear, crisp prints.