Markem's 5000 Series hot melt ink jet case coders allow users to operate up to four printheads with one controller. The 5200 is capable of controlling two printheads and the 5400 is capable of controlling up to four. Both systems can print on two sides of a box at the same time and are designed for manufacturing environments. They produce a print that maintains integrity and legibility, regardless of variations in corrugated or recycled content, and is not affected by moisture or condensation, says the company.