India Flint recommends that bundles be left to "rest" for a couple of days after coming out of the dye pot, before unwrapping them, in order to realize their full potential.
I think it's safe to say that all my bundles are underachievers, as it's nearly more than I can do to wait until they are cool before opening the little beauties.
So, the other night, 11:30 p.m. seemed just as good as 7:30 a.m. for unwrapping. Besides, I reasoned, I'd sleep better if I wasn't wondering what magic had occurred while this block of yumminess had been cooling for six hours.
Cassandra Tondro's site, this bundle was steamed rather than boiled for about three hours.
There was a chunk of salvaged iron in the bottom of my dye pot and a splash of vinegar in the water, but nothing else was added, and I forgot to dampen my paper before layering my leaf sandwich, so the paper was dry when I started the process.