Solvent-based ink is a type of ink that uses organic solvents as its primary carrier. This allows the ink to dry quickly and adhere well to various surfaces, making it popular for printing on materials like plastic, vinyl, and metal. The solvents in the ink evaporate after application, leaving behind the pigment or dye. These inks are commonly used in large format printing and outdoor signage due to their durability and resistance to fading. However, they can emit volatile organic compounds (VOCs), which may require proper ventilation during use to ensure safety and minimize environmental impact.