This one has me stumped.
The wound ball of yarn is my own 70/30 wool/nylon dyed Peapod Green. I get that colour using Washfast Acid Dye Ivy @ 0.25%
The top roving is 100% wool, from the same sheep, shorn at the same time. Also dyed with Ivy @ 0.25% – but it has come out a pale sky blue.
The bottom roving is from the same batch at the top roving, but this time dyed @ 0.5% – and this has come out a darker sky blue.
And here is the dye pot, after the roving (2nd batch) is removed.
The green is not striking the wool.
Same method of pre-wetting and dyeing the fiber. Same sheep. Same dye. No chemical treatment on any of the fiber. Fresh, clean water used for each batch (ie no leftover residue from some previous dyelot.) The water isn’t softened. Same mordant.
Only diff I know of is the nylon content vs pure wool.
The batches were dyed 24 hours apart.
At such a low rate of dye I would expect the dye to be completely taken up and only crystal clear water left at the end.
As Sarah Palin would say, “WTF!” (which I believe is American for #$#^*(*(@#!)