Abstract
A new method was developed which enabled us to obtain high-resolution images of the distribution of an oil-borne stain in a saw-textured plywood surface. The method involved treating 90 μm thick plywood sections, which had been cut transversely through the wood-coating interface using a sliding microtome, with osmium tetroxide (OsO4) prior to examination with a field-emission scanning electron microscope (FE-SEM) operating in backscattered electron imaging (BEI) mode. The combination of OsO4 staining and use of FE-SEM-BEI afforded excellent contrast differentiation between the coating and wood cell walls, revealing coating penetration into even nano-size cell wall cracks and delaminations formed during band-sawing of the plywood. The novel technique described adds a new dimension to probing wood–coating interface.
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Singh, A.P., Ratz, A. & Dawson, B.S.W. A novel method for high-resolution imaging of coating distribution within a rough-textured plywood surface. J Coat Technol Res 4, 207–210 (2007). https://doi.org/10.1007/s11998-007-9019-y
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DOI: https://doi.org/10.1007/s11998-007-9019-y