How does Yanmei prevent clay mud masks and hydro-gel masks from drying out inside small pods?
Standard plastic thermoformed cups often allow moisture vapor transmission over 6–12 months, causing kaolin/bentonite clay to solidify. Yanmei uses co-extruded high-barrier thermoforming films (PP/EVOH/PE) paired with multi-layer heat-seal aluminum foil lidding. EVOH (Ethylene Vinyl Alcohol) provides a near-zero Oxygen Transmission Rate (OTR < 0.1 cc/m2·day) and Water Vapor Transmission Rate (WVTR < 0.1 g/m2·day), maintaining optimal paste plasticity for 24 months.