Tuesday, 28 April 2015

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Dyeing is the methodology of adding shading to material items like strands, yarns, and fabrics. Dyeing is ordinarily done in a unique arrangement containing dyes and specific substance material. In the wake of dyeing, dyes particles have uncut compound bond with fiber atoms. The temperature and time controlling are two key calculates dyeing. There are primarily two classes of dyes, characteristic and man-made. 

The essential wellspring of dyes, verifiably, has by and large been nature, with the dyes being extricated from creatures or plants. Since the mid-18th century, in any case, people have created simulated colors to attain to a more extensive scope of hues and to render the dye more steady to oppose washing and general utilization. Diverse classes of dyes are utilized for distinctive sorts of fiber and at diverse phases of the material generation process, from free filaments through yarn and fabric to finished articles of clothing. 

Acrylic filaments are dyed with fundamental dyes, while nylon and protein strands, for example, fleece and silk are dyed with corrosive dyes, and polyester yarn is dyed with scatter dyes. Cotton is dyed with a scope of dye sorts, including vat dyes, and cutting edge manufactured receptive and direct dyes.

Dyeing is administered by three variables, the dye, the fiber and the dye liquor. All the three lead an autonomous support which impacts the system of dyeing. A dye must be water solvent keeping in mind the end goal to dye textile materials. It might be dissolvable by nature of its substance obstruction.

The arrangement of the dye from which it is connected is known as the „dye bath‟. A dye may have direct „affinity‟ for a fiber (or the other way around) i.e., it is held by the fiber either physically (retention) or synthetically (blend) when the fiber is submerged in the dye shower.

Aggregation of the dye in the fiber is a steady process, the rate of such building up being alluded to as the 'rate of dyeing'.

1. This rate of dyeing is administered by the state of the dye shower, to be specific centralization of dye, temperature, and vicinity of electrolytes; it is corresponding to each of the three components.

2. The rate of dyeing is additionally impacted by the „Material to liquor‟ which is communicated by a part, e.g. 1:20, which implies one section (by weight) of the textile material dyed in twenty times its weight of dye bath.

3. The rate of dyeing declines with expanding proportion of merchandise to liquor.
Dyeing is completed to create a certain „Shade‟ by which is implied a certain color, contrast in shade being because of distinctive ‟Hue‟. A blue shade might, for occasion, have a greenish or a rosy hue.The measure of dye required for the generation of a certain profundity of shade is communicated as a rate of the heaviness of the material. A 1% dyeing speaks to a shade delivered by the coloring of 100 lbs. of material with one lb. of (business) dye under all around characterized dyeing conditions. It is important to characterize these conditions in light of their impact on the „exhaustion‟ of the dye shower. Weariness confirms that measure of dye which is taken up the fiber or in specifically, that sum which stays in the dye shower after „equilibrium‟ in the middle of dye and fiber is come to wear.

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