Tiling 1

Ink on bark. Recently, while staining bark and observing the fascinating metallic shine from inks I came to think of the section in Feynman Lectures on Physics:

“…there is a general rule that if any material gets to be a very good absorber at any frequency, the waves are strongly reflected at the surface and very little gets inside to be absorbed. You can see this effect with strong dyes. Pure crystals of the strongest dyes have a “metallic” shine.”

Here is my test of this effect with green ink on birch bark.