7b. After 20 mins allow air which turns silk blue

Very successful woad dye after longer air exposure.
This should have been left to dry, as I returned it to dye bath to see if it would go darker. Big mistake! Subsequent re-soaking resulted in reversal of dye absorption and an off white result!
A pity as this 1st session gave an all over strong turquoise, whereas the 2nd session resulted in a paler turquoise. This depends on leaves used, age, how fresh etc.