a.Acid dye: Man made (Synthetic nylon) & Natural protein fibre (wool, silk) b.Azoic dye: Man made & Natural cellulosic fibre (Cotton, Viscose) c.Direct dye:Man made & Natural cellulosic fibre (Cotton, Viscose) d.Disperse dye: Mane made ester, cellulosic & synthetic fibres specially the acetate fibres & Polyester & less of acrylic & nylon fibre. e.Reactive dye: …
Continue reading Selection of dye according to fibre characteracid dye
Dyeing of Nylon with acid dye: Nylon-NH2 + H+ Nylon-NH3+ Nylon-NH3+ + DSO3– Nylon-NH3+O3–SD Recipe: Dye X% Acetic acid or ammonium acetate 3-5% Gluber salt 10% Temperature Boiling temperature M: L 1:2 Time 75 minutes Dyeing of silk with acid dye: The affinity of acid dye for silk fibres are good. But the …
Continue reading Dyeing of Nylon and silk with acid dyeThe application of acid dye on protein fibres results in an ionic or Soult lime between the dye molecule & the fibre polymer. The point of the fibre polymer at which the dye is attached is termed the dye site. In wool the dye sites are the many amino groups of fibre under dyeing conditions. …
Continue reading Dyeing of wool with acid dyeAcid dyes are Na- salt of sulphonic acid. But there are a few containing carboxyl groups. Acid dyes are applied in acid medium. That’s why these dyes are called Acid Dye. Acid dye have a direct affinity towards protein fiber and the main class are used in Wool Dyeing. Polyamide fibers have an affinity for …
Continue reading Acid Dye and its properties and Classification