colours

  • How Colours Are Discovered

    How Colours Are Discovered

    In the early 18th century, German chemist Johann Jacob Diesbach was at work in a laboratory trying to make a red pigment out of cochineal insects, the tiny bugs whose extract dyes everything from food to lipstick. Diesbach hypothesised that he could combine the carmine extract with alum, iron sulfate and potash to make the…


  • Melting Crayons Gets Pretty Psychedelic

    Melting Crayons Gets Pretty Psychedelic

    Video: There’s a moment (before it devolves into some sort of poisonous stew that people in the past had to eat because that’s all they had) where some of the crayons have not melted and the melted crayons have not completely mixed together. In that moment, this pan of melted crayons looks awesome.