I had anticipated finishing my latest batch of batik scarves over the weekend, however of the dozen that I dyed, I'm happy with only 2!
The second colour didn't take over any of the other colours, except the yellow. I tried to do a dark black/navy over some blue/red colours, and a brown/olive over the greenish colours, but alas I still have the original colours.
Perhaps its an issue with the dyes I'm using. I use Procion MX dyes which are fibre reactive. Maybe the problem is that the fibres have reacted with the dye during the first dipping, and then are resistant to colour after that?
When I did the batik workshop last year, I used Napthol dyes, but have been hesitant about purchasing a whole new batch of dye stuffs, and they were a little more complicated - but gave some fabulous colours.
I've been pouring over Ruth Issett's book, Colour on Cloth lately, which has some great techniques which I've been having a go at. I might give some of her suggestions for resist dyeing a go. The other thing that I might try is painting/printing rather than resists.
Of course all of this will have to wait until payday so that I can purchase some more scarves. Although, maybe I might try some of these ideas on calico (Muslin) first - however calico does seem to react differently.