Fig. 4From: Shrinkage and swelling behavior of archaeological waterlogged wood preserved with slightly crosslinked sodium polyacrylateRepeated shrinkage–swelling cycles of WW samples. a0–a2s PAANa-treated WW, b0–b2s untreated WW, c0–c2s shape recovery rate (%), a0–c0 original samples, a1d–c1d the first air-drying cycle, a1s–c1s the first swelling cycle, a2d–c2d the second air-drying cycle, a2s–c2s the second swelling cycle; scale bar 5 mmBack to article page