Neoprene Mahjong Mat California Prop 65 Compliance for US Wholesale OEM California Proposition 65 is a critical compliance regulation for consumer goods sold throughout California and the wider US market. For wholesale importers, Amazon sellers and mahjong retail stores, valid third-party test reports are essential to reduce compliance risks and support stable long-term cooperation. At B-ENJOY, we specialize in custom OEM mahjong mats for US customers. Our neoprene mahjong mats have successfully completed third-party California Prop 65 laboratory testing, following the official finished-product 3-in-1 mixed homogenized sampling standard. Tested Restricted Substances The Prop 65 test covers four key restricted substances for US consumer goods: Lead (Pb), Cadmium (Cd), Phthalates and Bisphenol A (BPA). All test results meet California Prop 65 safety limits, confirming product compliance for US market sales. 3-in-1 Mixed Homogenized Sampling Standard For finished composite neoprene mats, the standard testing method recognized by CPSC and California Prop 65 is mixed sampling. The lab takes multiple representative samples from different areas of the finished mat, mixes and homogenizes samples before testing. This method accurately reflects the overall safety performance of the finished product. Many buyers mistakenly believe layered separate testing is mandatory. In fact, layer-by-layer testing is mainly used for raw material inspection. Mixed homogenized sampling is the accepted standard for finished consumer mats for US import, Amazon listing review and retail filing.