We used a unique formula for the personal design of silicone for baking. We have never used additive materials so far. Adding materials will impair the performance and temperature resistance of silicone bakeware. Our silicone bakeware satisfies all food hygiene certification requirements. Our bakeware and other accessories have not found any white matter through pull, fold, etc. If white substances appear, it means that there are impurities in the silicone, It will damage the temperature resistance, stability and performance.