this is it, I rinced that solar dyeing. I've been over my own hopes, and managed to let the jar unopened for 18 days ! (which, I know, may sound ridiculous for some of you)
so the beginning of this solar dyeing was on August 04th, when we were on vacation in local mountains. I had planned to solar dye, so I had mordanted few bits with alum, as usual. I had brought a jar, with the fabrics in it, and filled with water.
what I had in mind was to pick bilberries (the European & Asian species of blueberry), aka vaccinium myrtillus, and crush them with the fabrics, add cold water, close the jar & wait. Well, that's what I did.