Including self-cleaning printhead, I-Mark Model C84e prints up to 4 lines of text from 0.05–0.61 in. high at maximum production line speed of 1,050 fpm. Continuous inkjet marking system may be used to print expiration dates, batch codes, logos and bar codes on porous/nonporous materials. It has solvent pump and improved startup/shutdown programs, flush routine that removes ink and flushes solvent to printhead nozzle, and vertical text positioning for fine adjustment of spacing between lines.