Table 1. Full widths of outline drawings in Fig. 3, following analysis in Fig. 4 .

Writing time (min)	Full width (left) (mm)	Full width (right) (mm)
8	1.2	1.1
16	2.1	1.7
32 a	1.9	1.8

^aThe widths are calculated for the 32 min case by analyzing the corresponding intensity – length graph in the blue channel rather than by using the green channel result shown in Fig. 4.