Investigations into the Sequential Application of Crease Resist Finish, Tannin and Cationic Reactant to Improve the Resistance of Sulphur Dyes to Oxidation

Abstract

The importance of sulphur dyes are realized due to the fact that they offer an economical method of achieving dyeing of good color strength and acceptable fastness on cellulosic substrates. However, the main limitations associated with this class of dye are the lack of availability of bright colors and it’s fading on exposure to laundering with detergent and perborates/peroxides formulations. In order to meet the growing requirements of customers regarding the higher wash fastness, garment traders are in turn demanding their suppliers to achieve these properties against single and multiple washes. In this study, sulphur black 1 dyed cotton fabric has been aftertreated with Fixapret CP, Bayprotect Cl and CC (Choline Chloride) with various sequential combinations to improve the wash fastnesss of the dyed fabric against the aggressive ISO-1O5 CO9 washing system. Sequential application of Bayprotect Cl followed by CC was found to offer a significant improvement causing a 12% reduction in percentage colour loss relating to the untreated fabric, which was comparable to the independent application of Fixapret CP with minimum deleterious effects on the hue, chroma and tensile strength of the fabric.

Aftertreatments of Sulfur Black 1 Dyed Cotton Fabric: Optimization of Process Parameters for Developing a Protective System to Improve Color Retention

“…18 Recently, studies involving the improvement of wash fastness of Sulfur Black 1 dyed cotton fabric with sequential aftertreatments using a cationic fixative (Tinofix ECO)/cationic reactant (choline chloride) followed by tannin (Bayprotect Cl) against the oxidative bleaching action of detergent/ perborate/bleach activator formulations (ISO 105 C09) have been reported. [19][20][21] It was found that the extent of wash fastness improvement imparted by the cation-tannin system was greater than that given by a cationic fixative alone. This study is based on developing a cation-syntan aftertreatment method for Sulfur Black 1 dyed cotton fabrics (reduced with two reducing agents-sodium sulfide and Diresul reducing agent D) that makes it resistant to the aggressive home laundering processes involving the bleach activator tetraacetylethylenediamine (TAED).…”

The development of a tannin-based after-treatment for cotton fabric dyed with sulphur dyes

“…However, for improving the wet fastness of sulphur dyeings by exhaust and continuous after-treatment methods; cationic fixing agents, lanthanides and crease-resistant finishes have been reported (Burkinshaw et al , 1997; Burkinshaw and Collins, 1995, 1997, 1998; Zhou and Yang, 2010). Besides, sequential application of cationic polymers/reactants, tannin and crease-resistant finishes have been found to improve the resistance of the dyeings against aggressive ISO 105 C09 washing (Mohtashim et al , 2020; Mohtashim and Rigout, 2017, 2019).…”

Investigation into the sequential application of cationic/anionic fixing agents to improve the oxidative washing resistance of CI Leuco Sulphur Black 1‐dyed cotton fabric

“…Recently, a preliminary study reported on the enhancement of wash fastness of Sulphur Black 1‐dyed cotton fabric with an after‐treatment involving the sequential application of a cationic fixative (Tinofix ECO) and tannin (Bayprotect Cl) against the oxidative bleaching action of detergent/perborate/bleach activator formulations (ISO 105 C09) . It was found that the extent of wash fastness improvement imparted by the cation‐tannin system was greater than that imparted by the cationic fixative alone.…”