Optimization of Dyeing Process of Alpaca Yarns Using Indigo Carmine (<em>C.I. Natural Blue 2</em>)

As part of an implementation in the Peruvian textile industry, the use of different sources to obtain blue hues in Alpaca fiber has taken on a prominent role. The present study investigated the optimization of the dyeing process of Alpaca fibers using indigo carmine as dye. The methodology was based on a Central Composite Design (CCD) and The Response Surface Methodology (RSM) and color strength (K/S) as a response variable. The results demonstrate that the independent variables significantly affected the color strength (K/S). In this context, higher increase in both mordant concentration (3.9887 g/L) and dyeing temperature (95 °C), coupled with lower exhaust time (30.0019 min), enhances higher levels of superficial dye adsorption. Additionally, color fastness properties provided tolerable values according to the gray scale. In conclusion, the optimization of the dyeing process of Alpaca fibers using indigo carmine enabled the achievement of a blue shade with satisfactory fastness properties in the fiber yarns.