There have been some questions about what type of colorant is use to make brightly-colored silicone products.
I’m in the process of reading a book called Advances in Polymer Coated Textiles=which states that coloring agents for silicone coatings need to be chosen carefully because organic pigments are not suitable for high-temperature uses. [Organic pigments are carbon based and can be natural or synthetic. Synthetic organic pigments are made from petroleum.]
Therefore inorganic pigments such as iron oxides and titanium dioxides are used.
I’m thinking this would hold true for silicone kitchenware as well.
I also found a study that measured color leaching from silicone: EUROPEAN JOURNAL OF DENTISTRY: Color Stability of Silicone or Acrylic Denture Liners: An in Vitro Investigation. Their tests show the silicone dental liners showed far less change in color than the acrylic liners.
Very interesting… I was interested in trying out Pantry Element’s Silicone Baking Cups, but they’re all multicolored, and come in no other color options, so I’m glad I came across this. Thank you for sharing!