Which types of fibers are typically used in direct digital printing?

The use of reactive dyes on natural fibers and disperse dyes on polyester is considered the correct approach for direct digital printing due to the chemical compatibility between the dye types and their respective fiber compositions. Reactive dyes bond chemically with natural fibers, such as cotton and rayon, providing vibrant colors and excellent wash fastness. This makes them suitable for direct digital printing on these types of materials.

On the other hand, disperse dyes are specifically designed for synthetic fibers, particularly polyester. These dyes are applied using heat to transfer the dye onto the fiber, which allows for high-quality prints that are both vivid and durable. This method is ideal for polyester, which is commonly used in textiles for its strength and resistance to wrinkling.

While the other options touch on different types of fibers and dye processes, they do not align with the typical methods used in direct digital printing. For instance, using reactive dyes exclusively on synthetic fibers wouldn't yield the desired results, as these dyes do not bond well with synthetic fibers. Similarly, printing only on natural fibers ignores the viability of synthetic materials in direct digital printing processes. Additionally, disperse dyes on cotton would not be effective, as cotton does not easily bond with this type of dye, resulting in poor color retention and fastness.