Fumed silicone makes dolls look better for the following reasons:
Transparency and appearance
Fumed silicone: It has high transparency and can be semi-transparent to fully transparent. This feature enables fumed silicone to better simulate the transparency of real skin when making dolls, especially when making parts that require high transparency (such as blood vessels, lip lines and other details). Fumed silicone can present a more realistic and delicate effect. For example, blood vessels can be clearly seen under the skin of some high-end silicone dolls, and lip lines are on the lips. These details are all due to the high transparency of fumed silicone.
Precipitated silicone: The appearance is usually milky white or translucent, with low transparency. When making dolls, precipitated silicone may not be able to fully present the delicate and transparent feeling of real skin, especially in parts that require high transparency, the performance of precipitated silicone may be relatively inferior.
Stretching performance and detail performance
Fumed silicone: The stretching rate is usually more than 700%, and it will not turn white when stretched. This excellent stretching performance enables gas-phase silicone to better withstand stretching and twisting when making dolls, thereby maintaining the integrity and realism of details. For example, when making small parts such as fingers and toes of dolls, fumed silicone can ensure that these parts will not deform or break when stretched, while maintaining the delicateness and realism of the skin.
Precipitated silicone: The stretch rate is usually no more than 400%, and it will turn white after stretching. This limitation of stretch performance may make it difficult for precipitated silicone to withstand large stretching and distortion when making dolls, resulting in less realistic details. For example, when making joints of dolls, precipitated silicone may deform or break due to insufficient stretch performance.
Tear resistance and durability
Fumed silicone: It has good tear resistance and can withstand large external forces without breaking. This feature makes dolls made of fumed silicone more durable, able to withstand friction and collisions in daily use, and maintain the integrity and beauty of the appearance.
Precipitated silicone: It has relatively poor tear resistance and may be more prone to breakage or damage. This may affect the durability and appearance of the doll, especially in the case of long-term use or frequent handling.

