How to Choose the Hardness of Silicone for Addition Mold

When we use mold silicone to make silicone mold products, we need to adjust the hardness of the silicone according to liquid silicone for gypsum mold  the characteristics of the product. liquid rubber mold makingThe hardness we are talking about now refers to the hardness of the silicone product after curing with the added liquid silicone. Silicone has one characteristic: it is very soft. liquid rubber silicone But in some cases, liquid silcone it needs to be hardened, and a common method of hardening is to add MQ resin to silicone rubber. There are many uses and the required hardness is also different. For example, a chocolate mold requires a hardness of 20-25 hardness, while a sex toy requires a hardness below 0-0 hardness.
The following is a list of common hardness and applicable fields of added liquid silicone, and also a list of added hardness corresponding to common products in daily life.
0-5 hardness (including less than 0 hardness) plus liquid silicone, the product feels super soft and has a hardness similar to human skin. Suitable for adult products, chest pads, shoulder pads, patches, anti slip pads and other flexible silicone rubber products, simulating human facial molds and body limb shapes. 5 hardness additive liquid silicone is harder than 0-5 hardness silicone, with a soft touch and similar hardness to rubber bands. Suitable for sugar flipping molds, soap molds, pad printing heads, etc.
10-20 hardness addition molding liquid silicone, with good softness and stretchability. Generally, it can be pulled continuously and is harder than rubber bands. Suitable for injection molding processes such as candles, handmade soap, candy chocolate, plaster lines, handicrafts, etc.

25-35 hardness addition molding liquid silicone, with high hardness, not easy to deform, good Lass performance, and similar hardness to an eraser, suitable for slicing and brushing molds. Such as cement products, cultural sandstone reliefs, resin crafts, tire molds, etc.
40 hardness additive liquid silicone has a relatively hard hardness and poor performance, similar to the hardness of shoe soles. It is generally used for filling, such as electronic sealing adhesive, to seal, dust, waterproof, and shockproof. It is not recommended for mold opening processes.
45-60 hardness addition molding liquid silicone, very hard, similar to plastic, almost no performance, very brittle, it will break when pulled, just like oxidized plastic products, it will break at a touch. The applicable range is similar to 40 hardness.