How to choose the hardness of addition-type AB silicone rubber? Here comes the correct analysis.
Nov 19,2024
The hardness of addition-type AB silicone rubber ranges from 0 to 60 degrees, and someone has finally provided a correct analysis on how to choose.
Silicone hardness needs to be measured with a durometer, generally using Shore C and Shore A; Shore A is mainly used for measuring silicone above 0 degrees, while Shore C is used for products below 0 degrees. As manufacturers, we need to regularly calibrate the durometer to ensure the accuracy of the hardness of the products we produce.
Hardness 0 degrees: Below 0 degrees feels soft, close to human skin, generally used for human skin, silicone dolls, sex toys, silicone masks, film props, etc. 0 degrees is slightly harder, but its performance is better than below 0 degrees. Hardness 5 degrees: Soft, generally used for soft silicone products, also used for small and delicate soap molds.
Hardness 10-20 degrees: Suitable for various casting types, with good tear resistance and softness, can be used for handmade soap candles, craft chocolate candies, ice cream molds, etc. Hardness 25-35 degrees: Good tear resistance, relatively hard, does not deform. Suitable for slice brush molds, can be used for cement products, resin crafts, sandstone reliefs, etc., and can also be used for simple textured product casting molds.
40 degrees is relatively hard: similar to sports shoe soles, suitable for precision casting, aerospace, and other large product mold opening types. When the hardness exceeds 50 degrees, silicone becomes brittle, tear resistance decreases, and it loses flexibility, suitable for filling or products and molds that require higher hardness.
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