Figure 4a: Semi-fine fabric, sample 202, XP (Field width = 3.4mm)

Figure 4b: Semi-fine fabric, sample 204, XP (Field width = 3.4mm)

Figure 4c: Semi-fine fabric, sample 43, XP (Field width = 5.4mm)

Figure 4d: Semi-fine fabric, sample 37, XP (Field width = 5.4mm)