Color fastness in Direct to Film (DTF) digital screen printing is influenced by various external factors, one of which is exposure to ultraviolet (UV) light. This study aims to evaluate the impact of UV light on the color stability of DTF prints on two types of fabric, namely 30s cotton and spandex rayon. A quantitative approach was used in this study, involving color difference testing (ΔE), washing simulations, and UV exposure. Based on the analysis results, cotton 30s demonstrated superior color fastness performance compared to spandex rayon, as indicated by lower ΔE values after UV exposure and washing processes. Conversely, spandex rayon experienced more drastic color changes, especially after being washed with bleach detergent. These findings emphasize that the selection of fabric materials and washing methods are critical factors.

In the printing process, PT XYZ still experiences several obstacles that affect the final result of the mold. One of them is the difficulty in equalizing the position of the screen and plate which causes register inaccuracy, as well as problems in the process of cutting the screen by the prepress operator. This research aims to make recommendations for the development of the Flexo Screen Puncher machine to overcome these problems. The method used is Quality Function Deployment (QFD) to identify user needs and translate them into appropriate technical responses. Based on the results of expert validation, the efficiency of the screen cutting process is the highest Voice of Customer (VoC) with an importance weight of 0.22. Meanwhile, the technical response with the highest Technical Importance value was obtained by the addition of visual management with a scale of 25%. This result indicates that every work process must be clearly visualized through visual management in order to minimize existing problems.