Why are most silicone rubber products black?

Conductivity requirements
Conductive particle color: Many silicone rubber products require conductivity, such as conductive silicone rubber buttons. To achieve this function, conductive particles such as carbon black and conductive carbon particles are usually added to silicone rubber. These conductive particles themselves are black and evenly dispersed in the silicone rubber, making the entire product appear black.
Stability of conductivity: Black conductive particles not only endow silicone rubber products with conductivity, but also ensure the stability of this conductivity. Stable conductivity is crucial for the reliable operation of products in applications such as electronic devices.

Material characteristics and processing requirements
Raw material characteristics: Silicone rubber itself is a colorless or semi transparent material, but in industrial production, various additives are often added to improve its performance or meet specific needs. Among them, some additives such as white carbon black may affect the color of the product, making it tend towards black.
Processing process: During the processing of silicone rubber products, such as high-temperature vulcanization, some chemical changes may occur in the material, which in turn can affect the color of the product. In addition, the cleanliness of production equipment and the condition of molds may also have a certain impact on the surface color of the product.

Cost and market demand factors
Cost considerations: In some cases, the production cost of black silicone rubber products is relatively low. On the one hand, black pigments or additives are usually cheaper and easier to obtain; On the other hand, black can conceal some minor defects in the production process, reducing the excessive requirements for raw material purity and processing accuracy, thereby reducing production costs.
Market demand: In some application scenarios, black silicone rubber products are more popular or practical. For example, in the fields of industrial equipment, electronic devices, etc., a black appearance is more in line with the overall design style and aesthetic needs of the equipment, and can also better adapt to harsh working environments.