Quote Originally Posted by Alan Johnson View Post
Anthocyanins are present at low concentration and may be hydrolysed but produce detectable tanning.
Other red/purple berries contain Anthocyanins, as a curiosity it may be possible to make staining developers from them.
I enjoy reading about your experiments in fundamental research. Thanks for doing this. Last month was cabbage, wasn't it? Or was it Quercetin?
Anyway, you spent an hour agitating that tank every other minute, having no idea if you'd get anything.
That's the patience a good researcher needs.

Mark Overton