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Researchers examined the effects of spraying fine water particles as a facial moisturizer for dry skin in adult women.
In well-insulated indoor environments, there is a decrease in indoor humidity during heating and cooling. This causes increased water loss from the skin, leading to the itchy and dry skin. To prevent itchy and dry skin, people often use steam and mist humidifiers. However, the diameter of the water particles formed by these devices is in micron size, and their long-term use can lead to an excessive increase in indoor humidity and condensation resulting in mold growth.
It has been previously shown that fine water particles help to act as a face moisturizer for dry skin. Recently a humidifier using a conductive polymer material (PEDOT/PSS) has been developed with the following characteristics:
- Fine water particles released without water supply
- Diameter of water particles at 5 μm or less and non-charged, allowing the water particles to pass through the gap between skin cells and sebaceous film, enter the skin layer and increase its water content, making the skin hydrated and moisturized
- Inhibition of indoor condensation and mold growth
The study hypothesized that when fine water particles formed by a PEDOT/PSS-equipped device are sprayed on the skin, the water content of the skin corneal layer would increase as compared to the use of steam and mist humidifiers. During the study, water particles of different diameters were sprayed on the facial skin, and their effect on the water content of the skin corneal layer was analyzed. The findings of this study were published in the Skin Research & Technology.
The study was carried on 17 healthy adult females aged between 30-46. All experiments were done in February. The researchers used three test conditions with different sizes of fine water particles. The measurements for each condition were obtained on different days.
The peak fine water particle size was below 0.5 μm in condition A, below 1.8 μm in condition B and below 5.4 μm in condition C. The amount of water released by spraying for 30 minutes for each condition was 1.9 g in condition A, 105 g in condition B and 480 g in condition C. Also, the fine water particles in condition A were non-charged and continuous operation with no water supply was possible. Steaming equipment under condition C was sprayed with fine water particles warmer than the other conditions.
The results of the study showed an increase in skin conductance for all conditions after 120 minutes of spraying fine water particles. However, the degree of increase was different and was significantly higher for condition A as compared to condition B.
The skin conductance was the highest in condition A because its water particles had the smallest diameter and were non-charged, which helped them to pass through the epidermal layer of the skin to the dermal layer. In addition, water retention function remained constant at 360 minutes after spraying.
Also, they found that condition A was highly convenient as the fine water particles could be sprayed repeatedly without replenishing water. Their findings indicate that non-charged fine water particles can act as a face moisturizer for dry skin in low-humidity environments.
Written by Pratibha Duggal
Reference: Nishimura, N., Inoue, S., Yokoyama, K., & Iwase, S. (2018). Effect of spraying of fine water particles on facial skin moisture and viscoelasticity in adult women. Skin Research and Technology.