Direct Dye: An Overview [A to Z]

Definition of Direct Dye An anionic dye which have substantivity for cellulosic fibres, normally applied from an aqueous dye bath containing an electrolyte is known as Direct dye. Chemical Structure of Direct Dye Significance or Properties of Direct Dye Classification of Direct Dye Based on migration test and salt control ability these dyes are classified as follows: […]

Classification of Textile Dyes

Dye is a complex compound which is applied in the textile materials represent color and contains chromophore and auxochrome groups in its chemical structure. Dyes or dyestuffs are classified according to their chemical structure would form at least 30 classes. The important types are discussed below: Acid Dyes This is a large class characterized by their […]

Winch Dyeing Machine

Working Principal of Winch Dyeing Machine  This is one kind old dyeing machine for fabrics in rope form with stationary liquor and moving material system. The machine is operated at a maximum temperature of 950 – 1000 C for open bath winch but for closed winch, the machine operates at a maximum temperature of 1300 – 1600 C. The liquor ratio […]

Dyeing Faults and their Remedies [Video]

Dyeing is the most technical part of the Textile Industries. Because you need to match the pre-production sample and production samples shade with buyers approved sample shade and it’s not an easy job. In some cases shade doesn’t match and you need to re-dye the whole batch and in some cases, the following dyeing faults occur:   Uneven […]

What is Textile Dyeing: Definition and Meaning

Definition of Textile Dyeing The dyeing process is aimed at giving woven or knitted fabric its intended color, crucial to its ultimate use. The process can be carried out at different stages of fibre processing, i.e. in different forms: staple, yarn, fabric (rope or open-width), and piece. When the process is carried out during the first processing stages, […]

An Overview of Azo Dyes

Introduction The dyes containing azo groups – N = N – are called Azoic Dye. These are not ready made dyes but are produced by reaction of two components – Diazocomponent or Base/Salt and coupling component (Napthol). Azoic dye also named as Napthol, Branthol, Magic and Ice color. Dye formation in fiber occurs on the basis of […]

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