Ohhh.....Another thing I meant to mention. Darn it!

Personally I would not suggest anyone to use the waste ink to refill their black tank as mentioned elsewhere in this thread, not only will it give you horrible results but evaporation of the ink making it thicker and dust and fibre contamination in the waste ink will only end up clogging the micro-mesh filter in the black CIS cart or worse still trashing your head.

Peace Zeb