1.   After the plate is inscribed, ink is applied and the excess is wiped off.

2.   The skin can be sanded to remove the layers where ink was applied in a process called dermabrasion.

3.   Until recently, the ink was applied to rigid boards because the technology relied on brittle silicon chips to regulate the electric charges.

4.   Yet even he would feel more assured if costly forensics tests determined just when the ink was applied to the paper.