Bloom (phase)

[2] Regulations exist in many counties that require both the levels of blooming and the materials involved to be of a safe level, for example the international symbol for materials approved for food contact is a wine glass and a fork symbol.

When sulfur bloom appears before vulcanization, the rubber is deprived of the crosslinking agent.

It remains insoluble in uncured rubber, thereby preventing migration and blooming.

[4] In rubber processing, ingredients other than sulfur can also "bloom", including antioxidants, fatty acids, and accelerators.

Chocolate that has "bloomed" remains edible but may have an unappetizing appearance and texture.