Brian and I have always used water based inks, ever since the start of S.I.K. Using plastisol was just not an option. But most people don’t understand the difference between the two. The obvious is look and feel – plastisol inks literally seem like plastic, they sit on top of the fabric, and eventually over time and washes, they begin to flake off. These days, plastisol inks are becoming softer, so the texture is less noticeable. But they still contain the harmful substances and demand the same chemicals for creation/cleanup as they did before. Water-based inks literally dye the fabric, getting softer with each wash and only fading as the fabric its dyed into does. They are not perfectly green, but are on their way and in the mean time are a lot less demanding on our earth than their plastisol counterpart.
Mantis Graphics has a great, short article about their reasons for using water-based inks; check it out here.