There will be various printing quality problems in digital textile printing. For each problem, we have proposed corresponding solutions:

Printed Pattern Is Not Clear
The phenomenon of blurred and incomplete pattern is mainly due to the mismatch between inkjet resolution ratio and fabric. Considering that the surface of fabric is not as smooth as paper, a resolution of 360 to 720 dpi is usually sufficient to meet the needs. For fine fabrics such as silk, the maximum resolution can be increased to 1440 dpi, but excessive pursuit of resolution will affect the injection speed and increase technical difficulty. The key is to select the appropriate resolution according to the fineness of the pattern and the characteristics of the fabric, and accurately adjust the height of the nozzle. If the nozzle is too low, it is easy to cause blockage, and if it is too high, it will cause the parabolic effect of the ink, affecting the pattern accuracy and color performance.

Color Level Is Not Rich, the Transition Is Not Natural
The problems of not rich color levels and unnatural transitions are mostly caused by improper selection of digital textile printing inks. It can be improved by the following methods: using dark and light double-color mode to increase density, or using pre-mixed "spot color" jet printing technology. The "spot color" jet printing needs to be equipped with a professional color measurement and matching system and an automatic pulp mixing system. Although the number of colors process is limited, it can significantly improve color expression.

Surface Roughness and Ink Flow Problem

Surface roughness or ink flow is mainly caused by improper adjustment or damage of the inkjet nozzle. Different printing precision is recommended for different fabric types: 720dpi high-precision printing is used for fine worsted fabrics, and 360dpi can be used for woolen fabrics, which can improve efficiency while ensuring printing quality.

Bad Hand-feeling of Printed Pattern
Bad hand-feeling is mainly caused by improper pre-treatment process. Optimization solutions include: selecting slurry with good water holding capacity to ensure printing fineness; paying attention to the de-paste property of slurry to ensure the hand-feeling after printing; controlling the fluidity of slurry to facilitate padding and sizing; improving the electrolyte resistance of slurry. At the same time, the alkali agent is used reasonably to promote the color development of dyes, and urea should be added to maintain humidity to ensure that the slurry and inkjet textile ink match the characteristics of the cloth.

Ink Penetration
The ink penetration phenomenon is closely related to the ink absorption capacity, fiber characteristics and tissue structure of the fabric. The solution is to treat the fabric with a suitable thickener to prevent ink diffusion by blocking the fiber gaps. For thin and loose fabrics, special attention should be paid to the quality and ratio of the thickener. It is recommended to determine the best solution through a gradient ruler and comparison test.

Poor Color Fastness
The color fastness of pigment ink, especially light fastness, is closely related to the type of resin. It is recommended to give priority to acrylic resin as a binder because of its excellent light resistance. At the same time, when selecting dye ink, special attention should be paid to its composition to ensure that the color fastness requirements are met.

The above improvement measures can effectively improve the printing quality of digital textile printing, meet the printing needs of different fabrics, and ensure the practicality and aesthetics of the printed product. In practical applications, it is recommended to optimize parameters and adjust processes according to specific conditions to achieve the best printing effect.