UV coatings and aqueous coatings are two types of finishing coatings used in the printing industry. The main difference between the two is the way they are cured or dried.
UV coatings are cured using ultraviolet light. When applied to a printed surface, the coating is exposed to a UV light source, which triggers a chemical reaction that hardens the coating instantly. UV coatings are known for their high gloss and durability, as well as their ability to resist fading and yellowing over time. However, they can be more expensive and have a strong odor during the curing process.
Aqueous coatings, on the other hand, are water-based coatings that are applied to printed surfaces using a coating unit on a printing press. The coating is dried through evaporation or absorption into the paper fibers. Aqueous coatings are typically less expensive than UV coatings and have a more natural look, with a matte or satin finish. They also have less odor and are more environmentally friendly, as they are water-based and produce less waste.
In summary, the main difference between UV and aqueous coatings in printing is the way they are cured or dried. UV coatings are cured using ultraviolet light, while aqueous coatings are dried through evaporation or absorption. UV coatings are known for their high gloss and durability, while aqueous coatings are more cost-effective and environmentally friendly.