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What is a lava lamp made of?

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A lava lamp (or Astro lamp) is a decorative novelty item, invented in 1963 by British accountant Edward Craven Walker, the founder of the British lighting company Mathmos. read more

As of 2014, the liquid ingredients in lava lamps are considered a trade secret, but until 1970, patents showed that they were made with paraffin wax, water, mineral oil and carbon tetrachloride. Whatever the current ingredients are, they are heated by a light bulb in the base of the lamp. read more