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

2021 ◽  
Vol 8 (1) ◽  
pp. 33-39
Author(s):  
Quratulain Mohtashim ◽  
Fareha Asim ◽  
Salma Farooq
Keyword(s):  
Process Parameters ◽  
Sodium Sulfide ◽  
Cotton Fabrics ◽  
Box Behnken Design ◽  
Wash Fastness ◽  
Color Retention ◽  
Optimization Of Process Parameters ◽  
Finishing Process ◽  
Protective System ◽  
Different Levels

Sulfur dyed cellulosic goods exhibit limited wash fastness against oxidative laundering; particularly to washing powder formulations containing activated bleaches. This study presents a novel two-bath exhaust finishing process to improve the wash fastness of Sulfur Black 1 dyed cotton fabrics reduced with two different reducing agents—sodium sulfide and a commercial glucose-based Diresul reducing agent D. The finishing process involves sequential aftertreatments with a cationic fixative and synthetic tanning agent (syntan). A Box-Behnken design with three variables: concentrations of cationic fixative and syntan, and application temperature of syntan (at three different levels) was studied to understand the effects of these variables on the color retention of the dyed cotton fabrics. Color retention of the sulfur dyeings was improved using the newly developed finishing process.

Optimization of process parameters for electrochemical nitrate removal using Box–Behnken design

2010 ◽  
Vol 56 (1) ◽  
pp. 265-270 ◽  
Author(s):  
Miao Li ◽  
Chuanping Feng ◽  
Zhenya Zhang ◽  
Rongzhi Chen ◽  
Qiang Xue ◽  
...  
Keyword(s):  
Process Parameters ◽  
Nitrate Removal ◽  
Box Behnken Design ◽  
Optimization Of Process Parameters

Light fading, rub and wash fastness of sulphur-dyed cotton fabrics aftertreated with cation–tannin protective system

2020 ◽  
Vol 49 (6) ◽  
pp. 431-439
Author(s):  
Quratulain Mohtashim ◽  
Muriel Rigout ◽  
Sheraz Hussain Siddique
Keyword(s):  
Public Awareness ◽  
Cotton Fabrics ◽  
Reducing Agent ◽  
Fastness Properties ◽  
Sodium Sulphide ◽  
Content Type ◽  
Wash Fastness ◽  
Goods And Services ◽  
Protective System ◽  
The Impact

Purpose Sulphur dyes are the most highly consumed colourants for cellulosic substrates owing to their reasonable cost and acceptable fastness. However, the use of noxious conventional reducing agent, sodium sulphide and impaired wash fastness against oxidative bleaching is gradually decreasing the market of these dyes. As the need for “Green” goods and services is raising public awareness, this paper aims to use a glucose-based biodegradable reducing agent in place of sodium sulphide to dye cotton fabrics with a range of commercial sulphur dyes. The study also proposes an aftertreatment method to improve the fastness properties of the dyeing. Design/methodology/approach The paper investigated the impact of a newly developed aftertreatment method on the fastness properties of dyeing. This involved the sequential application of a cationic fixing agent (Tinofix ECO) and tannin (Bayprotect CL) on the coloured fabrics and subsequent evaluation of colour strength, washing, light and rubbing fastness. Findings The effect of aftertreating the dyed cotton was found to significantly improve the light and wet rub fastness. The surface morphology of the dyeing remained unaffected as depicted by the absence of any finish residues. Research limitations/implications The protective effect of the cation–tannin aftertreatments was examined with a view to providing the necessary commercial performance; however, it was established that the dry rub fastness was either reduced or remained unaffected and the wash fastness to International Organization for Standardization 105 C09 was also marginal. Originality/value This finishing technique is novel and can be found useful for manufacturing sulphur-dyed products with the improved light and wet rub fastness.

Sign in / Sign up

Export Citation Format

Share Document