Description: 1. There is semi-permeable matte polyurethane or polyurethane foam to enhance the absorbency. film thickness: 0.025-0.035mm 2. When the hydrocolloid dressing is 0.4mm thick: permeability 0.34g/10 cm²/24h/37°C 106g/10 cm²/72h/37°C hygroscopic ability1.06g/10 cm²/24h/37°C2.46g/10 cm²/72h/37°C hygroscopic capacty2.74g/10 cm²/24h/37°C 3.52g/10 cm²/72h/37°C 3. Hygroscopic capability2.83g/g/24h/37°C3.23g/g/72h/37°C 4. PH 5.7 Acid&Alkali Resistance PH 3-12 5. Hygroscopic capacity and hygroscopic capability can be adjusted according to clinical need