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Screen printing uses two types of ink: plastisol and water-based ink. Both types of ink have their advantages and are equally popular in the screen printing industry. Choosing the type of ink that will be used is based on the type of application. Let’s take a look at both plastisol and water-based ink and the types of products they are used on.
Plastisol
Plastisol is a PVC-based system and a thermoplastic ink. It’s a top pick for items like sweaters, jackets, t-shirts, tote bags and backpacks. It’s very easy to work with and considered user-friendly, especially because it can be left on the screen for an extended period of time without clogging the mesh. Since plastisol can be used on wet applications, it speeds up production time and is ready to be used right out of the container.
Just as plastisol doesn’t dry on the screen, it doesn’t dry when left in an open container either. You can work seamlessly, leaving the lids off containers or returning unused ink back to the jar. This saves money and reduces waste since you can basically utilize every drop of plastisol. In order for the ink to dry, it needs a separate compound.
The biggest drawback to plastisol is that it can remelt if it comes into contact with a hot heat, which means products with this ink cannot be ironed.
Water-Based Solvents
Water-based solvents are a great pick for yard goods. Water is the main solvent, making this type of ink great for items that need to be penetrated. Most fabrics do better with plastisol rather than a water-based ink, but you’ll find that some fabrics like towels will benefit from water-based solvents.
When printing roll-to-roll yardage, water-based ink is best  since it’s fast and dries quickly. Unlike plastisol, water-based solvents have a soft-hand effect, meaning that you can’t feel the ink when you run your hand across the design. There are a few disadvantages, however, including the fact that water-based ink is difficult to cure and more aggressive because of the emulsion used.