在过去几世纪中,人们使用过许多方法来复制和发送图示信息。这些方法的质量、效率和速率反映了人类技术的发展。从洞壁、石板、纸草、铁板照相到闪光粉的道路是漫长而曲折的,但是,最近几年内进展是迅速的。瞬间照相术、静电印刷术和快速胶印术等概念满足了我们对快速记录和复制图示信息日益增长的需要。 In the past few centuries people have used many methods to copy and send pictorial information. The quality, efficiency and rate of these methods reflect the development of human technology. The path from cave walls, slate, papyrus, iron photography to glitter is long and tortuous, but progress has been rapid in recent years. The concepts of instant photography, electrostatography, and offset printing have met our growing need for quick recording and copying of pictorial information.