use | reactive dark blue K-R can be used for dyeing cotton and viscose fibers, with medium affinity, slow reaction, low fixation rate, and sufficient fixation time. It is mainly used for direct printing of cotton cloth, often with reactive orange K-G and reactive black K-BR for brown color. With reactive black K-BR, navy blue, blue black and other colors. It is also used for direct printing of dyed wool, silk and wool fabrics, as well as direct printing of vitamin cotton blended cloth. Used for dyeing cotton or viscose fiber |
production method | using h acid, cyanuric acid, amino c acid, aniline, copper sulfate, hydrogen peroxide, etc. as raw materials, first condensation of h acid with cyanuric acid, then diazotization of amino c acid, coupling with the aforementioned condensation product, complexing with copper sulfate in oxidizing medium, and finally performing a second condensation with aniline, the finished product is salted out, filtered and dried.. |