Curable Reducer is a viscosity reducer that will cure within a standard plastisol temperature range allowing the viscosity of plastisol inks to be lowered without fear of over reducing, resulting in ink curing problems. It thins out your inks and also reduces ink buildup on the bottom of your screens. You really should add a small percentage of reducer to all of your plastisol inks, as it helps prevent the screen from sticking to your garment after printing. Adding in 5%-20% of reducer is common, but there is no set rule to how much you add. Just know that the more reducer you add to your ink, the less vibrant your ink's color will be.