Polymers, large molecules composed of repeating structural units, are the foundation of a wide variety of materials. Plastics are perhaps the most well-known polymer-based materials, used in everything from packaging, bottles, and bags to automotive parts and electronic devices. Another significant category is fibers, such as nylon and polyester, which are key components in clothing, carpets, and ropes. Rubber, both natural and synthetic, is a polymer used in tires, seals, and flexible hoses. Other examples include silicones, used in sealants, adhesives, and medical implants, and epoxies, known for their adhesive properties and use in composites. Polymers' versatility stems from their molecular structure, enabling the creation of materials with specific properties tailored to diverse applications.

Polypropylene, a common thermoplastic polymer, does not inherently exhibit reflective properties. Its natural state presents as a translucent white when produced in bulk, and it can become more opaque depending on the additives included during manufacturing. To achieve a reflective surface with polypropylene, manufacturers often coat it with reflective materials like aluminum or apply a special reflective paint. However, without such treatments, polypropylene will not reflect light in a manner similar to mirrors or other highly reflective surfaces. It's worth noting that the glossiness of a polypropylene product can influence its light reflection, but this is still quite different from true reflectivity. For applications requiring significant light reflection, alternative materials or treatments are recommended.

Traps are often dyed primarily to protect them from the elements and to camouflage them from the targeted animals. When setting traps for fur-bearing animals or for wildlife management, the trap's visibility can significantly impact its effectiveness. A shiny or unnatural-looking trap can alert animals, leading them to avoid the area. Dyeing adds a layer of protective coating that helps prevent rust and corrosion, thereby extending the trap's lifespan. Additionally, the dye helps the trap blend into the natural surroundings, making it less noticeable to animals. The dye used is typically a natural dye or a specially formulated trap dye that adheres to the metal without reducing the trap's functionality.