Lyzer Dyefast 50

(Enhances wash fastness of cellulosics dyed with reactive and direct dyestuffs)

Appearance: Pourable transparent liquid.

Constitution: Cationic- amide condensation products.

Description: Cellulosic substrates are dyed with various classes of dyestuffs, which include direct, reactive, vat, azoic and sulfur colours. In the case of direct dyes the polyhydroxy character of cellulosic substrate prevents hydrophobic interaction between the dye and the fibre although hydrogen bonding may also contribute to dye fibre attachment. These relatively weak dye fibre bonds coupled with fairly high solubility of the dyestuff in water and hydrophilic nature of the cellulosic substrate are responsible for generally poor to moderate fastness properties on both viscose and cotton. In the case of reactive dyestuffs the dye reacts with ionised hydroxyls of water in alkaline conditions that are required for dyeing resulting in hydrolysis of the dyestuff that have no affinity for cellulose thereby reducing the wash fastness characteristics of the dyeings. Hence, it becomes imperative to provide an after treatment to fabrics dyed with direct and reactives to enhance fastness properties. Lyzer Dyefast 50 is formaldehyde based dye-fixing agent, which enhances wash-fastness of the dyeings by increasing the molecular size of the dye.

After dyeing the fabric is treated with a 0.3 to 0.6% solution of Lyzer Dyefast 50 squeezed and dried for fast dyeings.

Storage: The product enjoys very good shelf life and warrants no particular storage conditions. However it is always advisable to have moderate conditions with the container being recapped tightly after use. 9 to 12 months if stored below 30c

30, 50 & 200 Kgs in Plastic Container.
According to our best knowledge and technical experiments, the above data is true and accurate. Regarding to variety of consumption procedures, it is recommended to evaluate the information before use.


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