Bought an original drawing by Michelangelo.

买了一幅米开朗基罗的原作。

He would first trace his original drawing with ink in small sections so it stayed wet, then blot it onto absorbent paper, making a copy.

他会先用墨水在原画上画上一小段，让它保持湿润，然后把它吸在吸水纸上，复制一份。