Hewlett-Packard has announced its share of the Irish market for ink-jet products has increased by nearly 7 per cent between January and February. The company, which produces ink jet cartridges at its £420 million plant in Leixlip, now claims to command almost 60 per cent of the market. The Leixlip plant is the fastest growing division of the company world-wide, employing 1,300 people.