This skein was left hanging in the dye pot while I went away over Christmas. I'd dyed the teal colour you can see in the top left section. I know the dye was still active because when I went to rinse it out yesterday, the remainder of the skein picked up a pale version of the same colour. That's the colour you can see in the centre of the skeinBut I wanted more! So when I'd done rinsing, I mixed up a small amount of another blue colour, "sky", and dipped the other end of the skein in that for a good half hour before heating up the dye pot again. I left it overnight, just because I couldn't be bothered finishing it off. So now I have the intense blue that you can see at the lower right of the pic. I think that's enough.
Sorry, I didn't iron the white cloth before taking the pic, but the colours show up better on a white background, whether it's ironed or not.