Meanwhile...
I bought these here in a local shop. But, as always, they're far too bright white. Even more than you see here in the pic. So I gave a go at tea stain them. Like this:
Aaaand ta-da!
I'm very pleased with the result, and again, the white ones are far more white, and the dyed ones are just a bit golden. These are stockings worn in Majorcan traditional costumes, and girls dance in them, I think that's why they have that "historical" seam in the ankle. Also, this stockings were just 75% cotton and the rest was synthetic so maybe the AD ones will come out this nicely too.
I used black tea and I have another tea that makes the water pink sooo.. I might do more experiments soon :P