This standard provides a systematic guideline for enhancing the recyclability of polyethylene terephthalate (PET) material products, particularly rigid packaging containers and thermoformed products, during the initial design phase. Starting from the source, it specifies detailed requirements for various design elements, including the selection of base resins, control of colors and additives, and the treatment of labels, inks, adhesives, and various attachments. The aim is to ensure that products are easily identifiable, sortable, and processable, thereby improving recycling efficiency and the quality of recycled materials. To meet these requirements, relevant testing work involves using a colorimeter to quantitatively control the color parameters of the materials, as well as potentially utilizing instruments such as differential scanning calorimetry (DSC) to analyze the melting and crystallization characteristics of the materials.