The weather has decided to aim for "early summer" here, and today's temps were in the 90s, with a very low humidity. I put the skeins out on the balcony on a rack at 10:00am, and by the time I came down for dinner at 5:30pm, they were completely dry.
At the other end of the saturation spectrum is this silk scarf, which was dyed with what you might call "attar of roses." A few months ago, I tried to do an India Flint-like process of wrapping premordanted silk cloth with rose petals and letting it sit for a few days. In her book, she got faint pink splashes of color on the cloth. I got ugly brownish splodges. Yuck. (Thank heavens for overdyeing.)
But I had a lot of rose petals in the studio freezer that I had harvested late last summer. I hate to throw out something that might give color, so I put the petals (from *dark red* roses) into a pot of hot water and made a slurry of them using a hand-blender. The liquid was dark red. I strained out the solids and put two pieces of premordanted silk in the pot. Instant green. I kid you not. Subdued sage green, but definitely green.
I suspect that what's happening is that the red colorant in the water is fugitive - not capable of bonding with the mordant on the fiber. But there must be enough chlorophyll in the petals to make green. I've used chlorophyll extract from Earthues, and it was this shade of green. There's still one length of silk in the rose-petal dyepot. It might get darker if I leave it another day or two. Might not.
In the dregs of the Jatoba dyepot that gave me a lovely "peaches and cream" color on silk yarn (shown at the bottom of this page), there are two more lengths of silk cloth trying to grab the last few molecules of color in that pot.
When they're "done," I'll toss the rest of the liquid; it has done its job well but is clearly getting tired.