Plastisol ink and water-based ink are two primary types of ink used in screen printing, each with its own characteristics and advantages.
- Composition:
- Plastisol Ink: Plastisol ink is a PVC (polyvinyl chloride) based ink. It’s composed of pigment, plasticizer, and other additives. Plastisol ink is thick and has a paste-like consistency.
- Water-Based Ink: Water-based ink is made primarily of water, along with pigment, binders, and additives. It’s more fluid than plastisol ink and has a thinner consistency.
- Printing Process:
- Plastisol Ink: Plastisol ink requires curing at high temperatures (typically around 320-350°F or 160-177°C) to bond the ink to the fabric. This curing process can be done using a conveyor dryer or heat press.
- Water-Based Ink: Water-based ink air-dries or requires lower curing temperatures (usually around 250-320°F or 121-160°C) compared to plastisol ink. Some water-based inks may also require additional steps like heat-setting or steaming to cure fully.
- Feel and Texture:
- Plastisol Ink: Plastisol ink typically sits on top of the fabric, resulting in a thicker print with a slightly raised texture. The print may feel heavier and more substantial.
- Water-Based Ink: Water-based ink penetrates the fabric fibers more effectively, resulting in a softer and more breathable print. The print is often described as having a “softer hand” or feel compared to plastisol prints.
- Color Vibrancy:
- Plastisol Ink: Plastisol ink tends to provide more vibrant and opaque colors, especially on darker fabrics, due to its thicker consistency and ability to sit on the fabric surface.
- Water-Based Ink: Water-based ink may produce softer or more muted colors compared to plastisol ink, particularly on darker fabrics. However, advancements in water-based ink technology have led to improved color vibrancy and opacity.
- Environmental Considerations:
- Plastisol Ink: Plastisol ink contains PVC and phthalates, which are not environmentally friendly. It requires solvents for cleanup and can release volatile organic compounds (VOCs) during curing.
- Water-Based Ink: Water-based ink is considered more environmentally friendly than plastisol ink because it contains fewer harmful chemicals and VOCs. It’s easier to clean up with water and has a lower environmental impact.
In summary, plastisol ink offers vibrant colors, durability, and versatility, while water-based ink provides a softer feel, eco-friendliness, and improved breathability. The choice between the two depends on factors such as desired print characteristics, fabric type, environmental considerations, and personal preference.
