I just wanted to share this since I love pinks and purples but sometimes it is hard to find just the right light shade of pink or purple ink.
I don't have an exact formula for this. It is mostly water with a few drops of DMP. I just test it in the pen and use a syringe to add another drop of ink or water as needed.
If you want to try this I highly recommend starting with a very small batch. Either a sample vial or directly into the converter is what I like to do.