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2 Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2 2018

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Environmental valuation of selected transparent wood coatings from the view of fungal resistance

Vidholdová Z., Slabejová G.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2018

No. 103

164--168

Wood products with painted surfaces can reduce the risk of forming and spreading microbial infection on their surfaces. This study aims to characterize surface moulds resistance of selected transparent wood coatings based on polyurethane resins, polyurethane-acrylate resins, and natural wax withoilapplied in one, two or three layers. The growth activity of moulds (GAM) on the surface coated with wax - oil and waterbornepolyurethane-acrylate coating was higher than mould growth on the surface with polyurethane coating. The mould growth was decreasing with increasing number of coats of polyurethane or waterborne polyurethane-acrylate coating.

Aesthetic valuation of tropical wood colour by colorimetry

Vidholdová Z., Iždinský J., Reinprecht L.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2018

No. 104

302--306

Colorimetric measurements using CIEL * a * b * system are often carried out for the aesthetic evaluation on wooden surfaces. This study aims to characterize the colour of heartwood of twenty one tropical wood species by the CIE-L * a * b * colour system – lightness (L* ), redness (+a* ), yellowness (+b* ), chromaticity (C* ) and hue angle (h° ). Colour coordinate a* shoved a negative correlation against L* , while colour coordinate b* shoved a positive trend against L* , however both with a relatively small significance. No significance was found between the chromaticity C* and the lightness L* . Only for the hue angle h°was observed a more significant positive correlation against the lightness L*.