A thermoplastic material impregnated with lampblack. Toner adheres to the exposed areas on the photoconductor during the developing process and is then transferred to the paper to form the developed image on the paper.

• 一种用灯黑浸染的塑性材料。在显影过程中，色粉被粘到光电导体的曝光区，然后又被传送到纸上，从而在纸上形成显影后的图象。