Tulip dyes, especially known for their vibrant colors in tie-dyeing projects, are not typically labeled as fiber-reactive dyes. Instead, they are often referred to as "all-purpose" or "fabric" dyes. Fiber-reactive dyes chemically bond with cellulose fibers (found in cotton, linen, and rayon) under alkaline conditions, resulting in colorfast and vibrant hues that endure washing and light exposure better than other dye types. Tulip dyes, while capable of producing bright, appealing colors, may not offer the same level of permanence and washfastness as true fiber-reactive dyes like Procion MX. Consequently, if you're aiming for professional-grade colorfastness on cellulose fibers, exploring actual fiber-reactive dye options would be advisable. However, for casual projects, experiments, or activities with children, Tulip dyes are a highly accessible and user-friendly choice.

Acrylic yarn, a synthetic fiber known for its durability and affordability, is not typically recommended for swimwear. Its water-repellent nature means it doesn’t absorb moisture well, leading it to feel heavy and uncomfortable when wet. Additionally, acrylic is not as breathable as other fibers, which can further contribute to discomfort during and after swimming. It also lacks the stretch and flexibility found in materials specifically designed for swimwear, such as spandex or Lycra, making it less ideal for the snug fit required. On the plus side, acrylic is colorfast and resistant to sun and chlorine damage, but these advantages do not fully compensate for its drawbacks in aquatic environments. For swimwear that performs well in water and offers comfort, materials like nylon, Lycra, or spandex are more suitable choices.

Isotactic polypropylene (iPP) is a type of polypropylene where all methyl groups are oriented on the same side of the carbon chain, enhancing its crystallinity and thermal resistance. This configuration bestows iPP with remarkable mechanical strength, making it highly suitable for a range of applications. Common uses include packaging materials, textiles, automotive components, and consumer goods. Its high clarity and excellent chemical resistance make it ideal for food packaging, while its stiffness and durability are valued in the automotive industry for parts like bumpers and dashboards. Additionally, its affordability and recyclability contribute to its popularity across various sectors, aligning with growing demands for sustainable materials.