Chlorophyll pigments, derived from plants, are not typically used for coloring plastics due to stability and compatibility issues. Most plastics are processed at high temperatures, which can degrade chlorophyll, altering its color properties and effectiveness as a pigment. Furthermore, chlorophyll is not readily soluble in the polymers that compose most plastics, making it difficult to achieve an even distribution of color. Manufacturers often prefer synthetic pigments designed to withstand the conditions of plastic production and use, which also provide a broader range of colors. However, the push for eco-friendly materials has led to increased research into natural dyes and pigments, including chlorophyll, for niche applications where their limitations can be managed or are less problematic.

PVC (Polyvinyl Chloride) piping is technically recyclable, yet its recycling process is complex and less commonly implemented than for other plastics. The difficulty stems from PVC's chlorine content and the additives it contains, which necessitate specialized recycling methods. Moreover, the variety of PVC formulations can complicate sorting and recycling processes. Most recycling programs focus on more easily recyclable plastics such as PET and HDPE. However, some specialized facilities do accept and recycle PVC, turning it into products like flooring, piping, or garden hoses. It's vital for consumers interested in recycling PVC to check with their local waste management facilities for specific guidelines and capabilities.

Random copolymer polypropylene is a type of polypropylene (PP) in which ethylene monomers are polymerized with propylene monomers in a random manner. This random incorporation of ethylene into the polypropylene chain enhances the material's flexibility and clarity compared to the more rigid homopolymer polypropylene. It offers improved impact strength at lower temperatures and greater transparency, making it suitable for applications like food containers, medical packaging, and clear films. Additionally, it maintains good chemical resistance and processability. However, its stiffness and heat resistance are somewhat lower than those of homopolymer PP. Random copolymers are chosen for applications where a good balance between optical properties, flexibility, and heat resistance is required.