Adult colouring book craze prompts growth at Faber-Castell
A surge in the number of people buying adult colouring books has caused double-digit growth at German writing instruments manufacturer Faber-Castell.
The eighth-generation family firm has been forced to run extra shifts in its factory to keep up with demand, Sandra Suppa from Faber-Castell told The Independent.
Adult colouring books have become a surprise success in bookshops and have sold some 16 million copies worldwide.