A soil-yellow 100% cotton casual trouser turned into powder gray after dry cleaning; a slate blue top became green-gray after dry cleaning; another maroon dress turned into beige, and so on. Why does this happen? What kind of fabric is this? Why does it behave like this? Traditional single-color fabrics are made through various dyeing processes. Throughout the entire process, large amounts of water, electricity, heat, and other energy resources are required. In order to conserve energy as much as possible and reduce environmental pollution, people have been exploring more energy-efficient and scientific methods for producing fabric. As a result, someone invented the process of using printing instead of dyeing to produce single-color fabrics. A special coating used for printing instead of dyeing is applied. Since it is not water-soluble, garments made from this type of fabric can be washed with water. However, some organic solvents can affect it, including dry-cleaning agents. After dry cleaning, the color of the fabric changes. Although the color remains uniformly consistent, the original appearance has changed. Some colors alter their hue, while others change in depth, but the overall trend is towards becoming lighter.