Mold temperature and vulcanization time: In the production process, if the mold temperature is too high or the vulcanization time is too long, it will cause the color of the silicone tube to turn yellow after forming

Raw material quality: excessive hydroxyl content in the silicone rubber used, or poor quality of raw materials, will also cause the silicone tube to change color at high temperature

The use of catalyst and anti-yellow agent: if the quality of the catalyst used is not qualified, or no anti-yellow agent is used, the silicone tube is easy to yellow at high temperatures

Internal release agent and zinc stearate: If too much internal release agent or zinc stearate is added to the silicone tube, or the iron content is too high, it will also cause the silicone tube to change color