Technical requirements: Indicator requirements: Appearance: The appearance of the spray is colorless to hazy white spray, and the aroma conforms to the specified aroma of this product. pH value (25℃) 4.0~8.5 Internal pressure (25±1)℃/MPa ≤0.80 Ejection rate/% ≥95.0 Leak test (50±1)℃ No leakage heat resistance (40±2)℃ maintained for 24h recovery There is no significant difference after returning to room temperature and before the test. Cold resistance (5±2)℃ maintained for 24 hours. There is no significant difference after returning to room temperature and before the test. Microbial limits and harmful substance limits comply with the safety technical specifications for cosmetics (2015 version). Moisturizing effect is moisturizing. effect