The legitimate GPO-3 material itself does not contain lead, and compliant products have extremely low lead content and meet environmental standards.
1, Basic components (lead-free) GPO-3 (UPGM-203) is an alkali free glass fiber felt and unsaturated polyester resin hot pressed molding, with no lead in the main body: -Matrix: Unsaturated polyester resin -Enhancement: Alkali free glass fiber felt -Additives: halogen-free flame retardants, curing agents, release agents, pigments (all modern are lead-free) -Filler: mostly calcium carbonate, aluminum hydroxide, etc., without lead
2, Possible sources of lead (trace/avoidable) -Pigment impurities: Old formulas may use lead containing colorants (lead white, lead chrome yellow); Modern environmentally friendly GPO-3 has fully switched to lead-free pigments. -Impurities in fillers/additives: Low priced and inferior materials may introduce trace amounts of lead; Legitimate manufacturers will strictly control.
Conclusions and Recommendations - ✅ Legitimate and environmentally friendly GPO-3: Basic lead-free/trace amount
