| 摘要 |
A simplified process for making plates used in printing, including forming a chemically positive copy on a transparent or translucent sheet-like structure with the lines thereon being constituted of artificial powder without going through the steps of photographing and contact copying. The copy so formed may be directly used in retouching and then plate processing. This process does not require the use of photosensitive films and chemical photograhing so that the speed of making plates is increased and damage to the environment decreased.
|
