I am reposting this picture from riseaboveplastics but couldn't resist to the opportunity to add something about her t-shirt! In screen printing there are 2 ways to print your design: water based inks and plastisols. Synthetic plastisols inks are a PVC (polyvinyl chloride) based system that essentially contains no solvent.
Water-based inks use either dyes or pigments in a suspension with water as the solvent. Both have their own environmental impacts: if you want to read more about it, please read HERE.
We've been screen printing since a long time with eco-friendly water based for CurlyMonkey but the water waste was still a waste and we decided that it was time for zero waste. We recently switched to digital direct to garment printing and the experience has been awesome: no use of chemicals solvents to clean our screens, no water waste and still the use of eco-friendly water based inks. The soft feeling is greater than with water based and we can print as many colors as we want!