# The Use of a Natural Polysaccharide Extracted from the Prickly Pear Cactus (Opuntia ficus indica) as an Additive for Textile Dyeing

## TL;DR

This paper explores using a natural cactus extract as a sustainable alternative to chemical additives in dyeing silk fabrics.

## Contribution

The study introduces a natural polysaccharide from Opuntia ficus indica as a safe and sustainable dyeing additive for textiles.

## Key findings

- Samples dyed with prickly pear mucilage showed comparable or better color fastness than those with commercial additives.
- Colorimeter analysis confirmed minimal color change after washing, indicating good dye durability.
- The cactus-based additive is biodegradable and non-toxic, offering an eco-friendly alternative to traditional chemical aids.

## Abstract

The art of dyeing fabrics is one of the oldest human activities. In order to improve the fastness properties of dyeing products, various additives are added to optimize the uniformity of fibers and surfaces and improve dye distribution. Unfortunately, these additives can be harmful and very often are not biodegradable. This article reports on the possibility of using a natural additive for dyeing textiles: a polysaccharide extracted from the prickly pear cactus (Opuntia ficus indica). One type of fabric was tested, silk, with different colors. Several samples were prepared and dyed for each color, adding the same additives but also a commercial chemical aid for one of them and the mucilage of Opuntia for another. The fastness of the applied dyes was evaluated by washing at different temperatures with a common liquid detergent. All samples were analyzed before and after washing with a colorimeter to evaluate the color changes. The results of the analyses reported and compared indicate the potential of prickly pear mucilage as an additive for dyeing silk, which is easily accessible, safe, and sustainable compared to other commonly used additives.