Which? calls for action over printer ink costing 7 times more than Dom Perignon champagne

Which? is calling on regulators to take action against printer giants discouraging and even blocking consumers from using competitively-priced third-party ink as its research shows that branded ink can cost up to seven times more than Dom Perignon Champagne.  Yet significant price differences, almost half (49%) of the people surveyed by Which? continue to use…