## 1 Introduction
[PERSON] [15] has also contributed to this field, investigating the impact of plasma treatment on wool and polyamide 6 fibers. Her findings demonstrate improvements in the shrinkage resistance of wool and alterations in the microstructure and dyeing properties of polyamide 6, suggesting significant potential for enhancing the functional characteristics of treated textiles. The fundamental textile characteristics of wool, including the average fiber diameter (DMF), comfort factor (FC), and spinning fineness (FH), are critical determinants of its quality. A lower DMF content results in finer fibers and softer fabrics, which are highly valued in the market. A high FC indicates greater softness and reduced skin irritation, which are desirable attributes of garments in direct contact with the skin [3]. A high FH enables the production of fine, lightweight, and durable yarns that are essential for high-qualityproducts [16]. These characteristics significantly influence the comfort and durability of textiles, thereby emphasizing their importance in the textile industry. According to a study conducted by [PERSON] et al. [17], these properties are crucial for defining the quality and ultimate application of wool products. Regarding colorimetry parameters such as lightness (L*), chromaticity (a*, b*), chroma (C*), and color strength (K/S), research has demonstrated that these factors significantly influence the quality of wool fiber [18; 19; 20]. These parameters are fundamental in determining the visual appearance of the fabric and its subsequent market acceptance. [PERSON] and [PERSON] [14] observed that oxygen plasma treatment can enhance these parameters, resulting in improved dye absorption and increased colorfastness. Medullation properties significantly influence the quality of natural fibers. Vicuna fibers are characterized by their fineness and softness, owing to the absence of medullulation. In contrast, sheep wool and alpaca fibers exhibit variations in medullulation, which affects their application and value in the textile industry [21]. Various studies have indicated that the medullulation properties of wool fibers, such as the proportion of fibers with medulla (TMED), number of fibers without medulla (NMED), presence of fibers with fragmented medulla (FMED), length and distribution of interrupted medulla (DMED), presence of intact medulla (CMED), and identification of fibers with prominent medulla (SMED), significantly impact wool fiber quality [22]. These characteristics influence the softness, strength, and appearance of the fabric, which are essential for determining its suitability for different textile applications [23]. For instance, [PERSON] et al. [24] evaluated the incidence and relationship between medullulation types and fineness in sheep, alpaca, llama, paco-vicuna, and angora rabbit fibers, emphasizing the importance of reducing the incidence of medullulation to enhance the quality of textile processing. The research by [PERSON] et al. [25] reported a bio-innovative pre-treatment of coarse wool fibers, highlighting the presence of medullulation in these fibers and emphasizing the importance of utilizing the entire fleece in the context of sustainability. The use of enzymatic complexes and percarbonate bleaching results in clean, high-quality wool fibers, minimizing the environmental impact and improving energy efficiency. This approach is crucial for sustainable textile production, enabling the maximum utilization of available resources and reducing waste. Regarding the controversial and divergent hypotheses, several studies have elucidated the advantages of plasma treatment in dyeing wool with _Dactylopius coccus_ dye. For instance, [PERSON] et al. [11] demonstrated that plasma combined with polypropylene imine dendrimers significantly enhanced dyeing capacity, suggesting that an APPJ could surpass conventional methods. [PERSON] et al. [26] indicated that oxygen plasma pre-treatment enhanced the dyeing capability of wool with natural extracts such as pomegranate peel.