close
    why some mug changes color when hot water is added?

    chemistry use of cobalt

    0  Views: 316 Answers: 1 Posted: 10 years ago

    1 Answer

    They are also known as morph or chameleon mugs.

    Thermochromic paint is a relatively recent development in the area of color-changing pigments. It involves the use of liquid crystals or leuco dye technology.

    After absorbing a certain amount of light or heat, the crystallic or molecular structure of the pigment reversibly changes in such a way that it absorbs and emits light at a different wavelength than at lower temperatures.

    Thermochromic paints are seen quite often as a coating on coffee mugs, whereby once hot coffee is poured into the mugs, the thermochromic paint absorbs the heat and becomes colored or transparent, therefore changing the appearance of the mug.


    Top contributors in Uncategorized category

     
    ROMOS
    Answers: 18064 / Questions: 153
    Karma: 1101K
     
    Colleen
    Answers: 47272 / Questions: 115
    Karma: 953K
     
    country bumpkin
    Answers: 11324 / Questions: 160
    Karma: 838K
     
    Benthere
    Answers: 2393 / Questions: 30
    Karma: 759K
    > Top contributors chart
    446710
    questions
    717119
    answers
    675299
    users