China Basic Black Cationic Dyes Suppliers - High-Quality Industrial Factory Products for Various Applications
Product Introduction
Basic black, also named cationic black, is a water-soluble cationic basic dye. Its molecule contains alkaline amino groups. After dissolving in water, it ionizes into positively charged dye cations, which bind to negatively charged substrates via electrostatic adsorption for coloration. Commercial basic black products are either single-component dyes or blends of basic blue, basic yellow and basic red to formulate pure black shade.
Physical & Chemical Properties
Appearance
Dark black / bluish-black fine powder
Water Solubility
Highly soluble in cold and hot water, solubility range: 150~300 g/L, aqueous solution shows black color
Optimal pH for Dyeing
Weakly acidic pH 4.5~6.0; color shade becomes lighter and dye uptake declines under alkaline conditions
Fastness Performance
Extremely high tinctorial strength and fast dyeing speed; light fastness: Grade 4–6, moderate washing & soaping fastness (Grade 3–4). Wet fastness can be improved by applying cationic fixing agent; not resistant to chlorine bleaching.
Frequently Asked Questions
FAQ What is Basic Black dye?
Basic black, also referred to as cationic black, is a water-soluble cationic basic dye featuring alkaline amino groups within its molecular structure.
FAQ How does Basic Black bind to substrates?
After dissolving in water, it ionizes into positively charged dye cations that bind to negatively charged substrates through electrostatic adsorption for effective coloration.
FAQ What is the composition of commercial Basic Black dyes?
Commercial basic black products are formulated either as single-component dyes or as specialized blends combining basic blue, basic yellow, and basic red to produce a pure black shade.
FAQ What is the optimal pH range for dyeing with Basic Black?
The optimal pH range is weakly acidic at pH 4.5~6.0. Under alkaline conditions, dye uptake declines and the resulting color shade becomes lighter.
FAQ What is the water solubility of Basic Black?
It is highly soluble in both cold and hot water, exhibiting a solubility range of 150~300 g/L, with aqueous solutions presenting a distinct black color.
FAQ How can the wet fastness of Basic Black be improved?
Wet fastness can be enhanced by applying a cationic fixing agent during post-treatment. Note that the dye is not resistant to chlorine bleaching.