Figure 2 - Marking the occlusal contacts during manipulation of the articulator.

From the following article

Inter- and intra-operator reliability of the recording of occlusal contacts using 'occlusal sketch' acetate technique

S J Davies, R J M Gray, M Z Al-Ani, P Sloan & H Worthington

British Dental Journal 193, 397 - 400 (2002) Published online: 12 October 2002

doi:10.1038/sj.bdj.4801575