Fig. 4From: The effect of halloysite nanotubes dispersions on vegetable-tanned leather thermal stabilitySEM images of untreated (top left side) and treated leather: HNT-PEG treated sample (top right side): swollen fibres and melted surface; HNT-beeswax treated sample (bottom left side): fibres with rounded edges and partially melted; HNT-BNUTO treated sample (bottom right side): slightly swollen fibres and partially melted. Magnification ×2000Back to article page