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2. Blue lava - Wikipedia

   en.wikipedia.org/wiki/Blue_lava

   Blue lava, also known as (Indonesian: Api Biru), [1] and simply referred to as blue fire or sulfur fire, is a phenomenon that occurs when sulfur burns. It is an electric-blue flame that has the illusory appearance of lava .

3. Film - Wikipedia

   en.wikipedia.org/wiki/Film

   Film stock consists of transparent celluloid, acetate, or polyester base coated with an emulsion containing light-sensitive chemicals. Cellulose nitrate was the first type of film base used to record motion pictures, but due to its flammability was eventually replaced by safer materials.