Since trading cards are often classified as toys or children's products, they must meet strict safety standards. For the US market, CPSIA (Consumer Product Safety Improvement Act) compliance is mandatory, specifically regarding lead and phthalate content in inks and coatings. For the EU, products must bear the CE Mark and comply with EN71 parts 1, 2, and 3. Additionally, sourcing from a factory with FSC (Forest Stewardship Council) certification is highly recommended to prove the paper is sustainably sourced, which is a growing requirement for major retailers.