KaltazidfastFärbung

KaltazidfastFärbung refers to a specific dyeing process used primarily in the textile industry. The name itself is a portmanteau of German words suggesting a cold (kalt), acid (azid), and fast (fast) dyeing method. This technique is characterized by its ability to achieve high wash fastness and light fastness on various types of fibers, particularly protein fibers like wool and silk, as well as polyamide.

The "cold" aspect of the name implies that the dyeing process is conducted at relatively low temperatures compared to other dyeing methods, often at room temperature or slightly elevated. The "acid" component indicates that the dye bath is acidic, typically adjusted using acids like acetic acid or sulfuric acid. This acidic environment is crucial for the interaction between the anionic acid dyes and the cationic sites on the fibers. The "fast" designation highlights the excellent resistance of the resulting coloration to fading from washing, light exposure, and other forms of wear.

KaltazidfastFärbung achieves its durability through strong ionic bonds formed between the acid dye molecules and the fiber. The low dyeing temperature allows for controlled diffusion of the dye into the fiber structure, promoting a thorough and even penetration. This method is favored for its efficiency and the high-quality, long-lasting color results it produces, making it suitable for garments and textiles that require significant durability in their coloration.