How a European colour revolution brought us the humble Christmas card; The Victorian era was not as dusty and monochrome as we think; a new exhibition and a research project, Chromotope, explores a wave of chemical breakthroughs that brought colour to the people

Byline: Andrew Pulver What would Christmas be without the humble Christmas card? It's hard to think of a more quintessentially British seasonal tradition than propping up colourful bits of stiff [...]