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The article describes the principles of operation and unique problems that might occur during scanning of samples of various wood species with a structured-light 3D scanner. The article describes (according with literature) where structured-light 3D scanners are classified in the general 3D scanning devices taxonomy. Additionally, the article shows how to solve certain problems that might appear during scanning of certain types of wood species.
Durability of water-soluble coatings on wood, weathered in natural conditions. The appearance and durability of coatings on wood joinery is important for economic and aesthetic reasons. This paper discusses the results of observations carried out after 36 months of exposure in natural conditions according to the requirements of PN-EN 927-3. The degree of changes of paint coatings applied to samples of wood - pine and larch, was evaluated.
The effect of the annual growth and the late wood share upon density of the Polish pine wood as a function of its origin. In the paper the variations of density of Polish pine (Pinus sylvestris L.) in a function of the late wood share in the annual growth with regard to the wood origin are presented. The measurement of density of wood was performed by using the stereometric method described in the works by Krzysik. This method consists in measurements the volume of the sample by determination of the various dimensions (length, width, height), and weighting of the sample mass. Nevertheless, measurements of the late wood share in the annual growth had been carried out according to own methodology which based on the classical method described in the work by Krzysik. The comparison was made for pine from natural forests derived from four different regions of Poland. The effect of the share of the late wood on the density Polish pine wood is observed. However, Pearson‘s r correlation coefficient values depend strongly on the examined wood origins.
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