Firstly, let's analyze the reasons for the formation of bubbles. The first reason is that the bubbles introduced when mixing human silicone A and B are not completely eliminated. Therefore, when stirring human silicone, we need to stir it in one direction and let it stand for a period of time after stirring, allowing the bubbles to float up on their own. Secondly, when filling the gel, it is best to let the silicone gel flow slowly in a filamentous shape. This can eliminate bubbles while pouring the gel. After filling, the surface bubbles can be punctured with a toothpick. Besides, we can also reduce bubbles by extending the operation time of human silicone gel, giving it more time to naturally release bubbles. This way, the cross-linking time of human silicone gel in the early stage will increase, and the air in the mold will gradually be discharged to achieve the goal of reducing bubbles.