| 摘要 |
<p>A direct printing method and apparatus in which a computer generated image information is converted into a pattern of electrostatic fields, which selectively transport electrically charged toner particles from a particle source (3) toward a back electrode (12) through a printhead structure (5), whereby the charged toner particles are deposited in image configuration on an image receiving substrate (1) caused to move relative to the printhead structure. According to the invention charged toner particles are used that have an irregular surface structure, an average volume diameter (Dv) comprised in the range of 3 to 8 νm and a BET specific surface area in the interval 15/Dv ≤ BET ≤ 60/Dv.</p> |
