1. 2. 3.
4. 5. 6. 7.
2. The dots represent positive charges on the plate.
3. The original document is projected through a camera lens onto the plate. The charge is
drained away in areas of the plate that are exposed to light. The dots retained here are
the positive charges representing the latent image.
4. Negatively charged powder is cascaded over the plate and adheres to the positive image.
The latent image now becomes visible.
5. A sheet of paper (or a paper offset master) is placed over the plate, and the paper is
given a positive charge.
6. The positively charged paper attracts powder from the plate, forming a direct
7. The print or offset master is fused by heat for permanency.