Ink cartridge sales have now been proven to be seasonal. Figures on UK searches for the term "ink cartridges" have been released by Google who has the largest share of the UK search market. The results are easy to view via the graph below that shows the winter months are the busiest in this area of the UK economy. As expected a large drop is seen at Christmas as minds are focused on other things, but with a sharp increase in January during the cold and short days.