Figure 2.
The image features six different close-up photographs of fibrous materials, each labelled with identifiers A 4, A 8, H 4, H 8, H 4 B, and H 8 B. The upper row includes A 4 on the left, A 8 in the centre, and H 4 on the right. The lower row contains H 8 on the left, H 4 B in the centre, and H 8 B on the right. Each image displays a similar texture and appearance of the materials, but varies subtly in characteristics highlighted by the labels. The organised grid layout helps to compare the different samples visually across two rows.Extracted fibres after the chemical treatments