Search results
Results From The WOW.Com Content Network
In a reactive dye, a chromophore (an atom or group whose presence is responsible for the colour of a compound) contains a substituent that reacts with the substrate. Reactive dyes have good fastness properties owing to the covalent bonding that occurs during dyeing. Reactive dyeing is the most important method for coloring cellulose fibers.
Reactive dye printing is a method of printing fabrics using reactive dye incorporated into a paste or wax including components such as sodium alginate gum, soda ash, urea and kerosin. Typically, the dye is dried at 130 degrees and cured at 180 degrees to permanently bond it, and the fabric later treated with a softener for better hand feel.
Package dyeing is a method where yarns are wound on perforated cones placed in a dye vessel. The dye solution is then alternatively pushed inside out and vice versa. Examples are many stripes, patterned (checks) and jacquard designed fabrics. [9] [15] Piece dyeing: In piece dyeing, the dyeing takes place after producing fabrics with undyed ...
Tyrian purple or royal purple is a purple-red dye which is extracted from several genera of sea snails, primarily Murex brandaris the spiny dye-murex (currently known as Bolinus brandaris). Murex dye was greatly prized in antiquity because it did not fade, rather it became brighter and more intense with weathering and sunlight. [33] rubia
The like charges repel each other, and the addition of salt aids in dyeing by generating a positive charge on the cotton surface. [7] [8] The industry has predominantly used reactive dyes to color knitted cotton goods. The treatment of salt-laden, colored effluent generated by the dyeing process is one of the industry's primary concerns. Cotton ...
In its decision to ban Red Dye No. 3 this January, the FDA cited the Delaney Clause as the primary reason, but re-emphasized that current science does not directly indicate that the levels of Red ...
Adire textile is a type of dyed cloth from south west Nigeria traditionally made by Yoruba women, using a variety of resist-dyeing techniques. [1] [2] The word 'Adire' originally derives from the Yoruba words 'adi' which means to tie and 're' meaning to dye. [3]
Dye molecules are fixed to the fiber by absorption, diffusion, or bonding with temperature and time being key controlling factors. The bond between dye molecule and fiber may be strong or weak, depending on the dye used. Dyeing and printing are different applications; in printing, color is applied to a localized area with desired patterns.