Dyes are available in market in different forms, such as- Fine powders, granular form, aqueous paste, liquid solution or dispersion. Commercial dye powders are not available in pure form; they usually contain various other chemicals (Admixtures) besides the principle dyestuff. These includes- – Diluents such as salts or starch – Wetting agents – Dispersants – Impurities …
Dyeing methods and Dyes Selection Textile dyeing can take place at different stages of the manufacturing of the textile. There are various methods of textile dyeing which are as follows: Fibre Stage Dyeing Method Yarn Stage Dyeing Method Fabric Stage Dyeing Method Garment Stage Dyeing Method Fibre Stage Dyeing Method (Stock Dyeing) In this method, the …
Emdadul Haq Lecturer, Department of Textile Engineering, Primeasia University; Bangladesh Effluent Treatment Plant or ETP is one type of waste water treatment method which is particularly designed to purify industrial waste water for its reuse and it’s aim is to release safe water to environment from the harmful effect caused by the effluent. Industrial effluents …
👉Adsorption Dye molecules when come to the contact of the textile fibre. Dyes do not penetrate into fibres rather stay on the surfaces of textile materials. 👉Sorption Dye molecules when entered into the fibre. 👉Desorption The removal of the adsorbed atoms, molecules or ions from a substrate is called desorption. When the dye molecules come out …
The general theory of dyeing explains the interaction between dye, fibre, water and dye auxiliary. Dyeing process is essentially a distribution process. The dye is distributed over at least two phase systems, the dye bath & textile materials. The dyeing process consists of basic four stages which are: Migration of the dye from the solution …
Affinity: is the attraction of dye to the fibre at normal condition of dye bath. It defines the quality of the dye. Affinity of a dye does not depend on any external factors such temperature, M:L, type of fibre or concentration of electrolyte etc. Initial absorption of dyes due to affinity is called the color …