Tips | Reasons for Ink Flow and Ink Bleeding in Digital Printing

Q: Reasons for ink flow and ink bleeding in digital printing

A1: The reason for the coarse particles on the surface or the flow of ink during the printing process of the finished digital direct-injection printing product is mainly due to improper adjustment or damage of the ink jet port. At this time, we should choose the appropriate digital direct printing printing accuracy. Generally worsted thin fabrics are mostly printed with high precision 720x720dpi. The printing accuracy is directly related to the printer resolution. Using 720dpi resolution for fabric printing, the accuracy is quite high. And general woolen fabrics of woolen fabrics can be printed with 360X360dpi precision. This can not only improve the printing speed, but also meet the printing accuracy.

A2: The reason for the infiltration of the ink after digital direct-injection printing is that the printing part of the fabric can absorb the ink in less volume. Under the action of the capillary effect, the excess ink on the fabric surface spreads along the capillaries between the fibers, resulting in digital printing. The direct-jet print pattern bleeds. In addition, in addition to the composition of the ink itself, the main factors affecting the permeation of dye inks on fabrics, fiber types and fabric structure and specifications are also very important factors.

So how to solve it?

The fabric is treated with a suitable thickener to block the voids between the fibers and prevent the ink from spreading along the capillaries. For thin and loose fabrics, the gaps between fibers are large and the water holding capacity is poor. During digital direct injection printing, the ink is easy to flow along the gaps between fibers, causing seepage. The structure of the fabric is tight, the space between the fibers is small, and the penetration of the ink is small. The quality and use ratio of digital printing toners are very critical. It is necessary to use a gradient ruler to compare (small samples) in the proofing and conduct experiments.