Magic Colour Change Mugs have a unique thermo-sensitive coloured coating that reacts to heat by turning transparent, which will in turn reveal the printed image from beneath the coloured coating. When cold, the thermo-sensitive coating retains full colour and has the effect of hiding the image.
Darker coloured mugs will hide the image better than lighter coloured mugs. Lighter mugs can be useful in creating a unique colour change effect or if your image is predominantly the same colour as the mug. For example, a Blue logo would be mostly hidden by the coating of a Blue Colour Change Mug.
Magic Colour Change Mugs are not intended to hide the image completely; they are designed to provide a unique Colour Change effect.
Microwave and Dishwasher Safe.