How to adjust the hardness of silicone?

The first method: use relatively high hardness silica gel and lower hardness silica gel, and mix the two according to a certain proportion; generally in the case of harder silica gel, such as 50-degree (Shore hardness) hardness silica gel and 30-degree hardness silica gel Hardness: After mixing the silica gel, the hardness of the silica gel is about 40 degrees.

Second method: Generally, we can use silicone oil to reduce the hardness of silicone. However, in practical applications, if the silicone oil ratio is added to destroy the molecular weight, tear resistance and tensile strength of the silicone, corresponding deterioration will occur, thus affecting the service life of the silicone mold. In addition, an excessive proportion of silicone oil will also cause the silicone rubber mold to easily deform. Therefore, the ratio of silicone to silicone oil generally does not exceed 5%, and silicone oil with a larger viscosity should be added as much as possible. If the silicone oil content exceeds 5%, please use a small amount to determine whether it can be used.