Post 306 –by Gautam Shah
Woods are fashioned to a variety of finishes such as bark stripped, chopped, rough hewn, sawn, planned, sanded, etc. Timbers gain variety of finishes due to planned seasoning, ageing and exposures. Such finishes are valued for certain uses and so re-formed on fresh timbers, or old surfaces are restored-altered for specific effects.Timbers offer surface quality that is end of the grains, and faces towards and away from the core.
Finishes for wood depend on several factors.
Primarily a wood finish depends on its proposed use as a product or composite. The product defines its sensorial and engineering properties. The product also determines, the technology used for sizing and then finishing. The wood for a product is checked, if it is sap inclusive or heart exclusive, type of wood – soft or hard, type of cut – quarter, rift, tangential or slab, etc.
Quality of wood (jungle -often called firewood, commercial or special timbers, etc.) and form of the product requires very specific method and material of applique finishing. The applied finishes are affected by the nature of wood (soft or hard), level of moisture content, direction grain, presence of gum-resins (aliphatic compounds, waxy and resinous substances), and colour. Overt finishes must take care of grain filling, colour correction (by staining-bleaching), and rectification of anatomical anomalies such as straight or cross grain, knots, shakes, pith, etc.
Wood sizing, product shaping and finishing, all are affected by the atmospheric conditions (temperature, moisture, wind, dust). Wood finishing technology is product dependent, which in turn is considered in terms of its economic viability. The time and effort involved in finishing a wood product must match its economic, aesthetic and functional requirements. A low quality wood, a low-cost product, or an engineering-structural item whose sensorial qualities are less relevant must receive appropriate treatment.
Wood products where feel or texture also necessitates visually appealing finish. This process starts with selection wood, grain pattern and its orientation, finishing technique and the coating. In case of restoration and conservation of wood structures and other utilitarian items, one must check the age of wood, decaying agents, presence of moisture, surface contaminants like dust, soot, oil-grease, residues of earlier finishes, burns and marks of singeing, sunken grains, etc. Other important cares include tools and techniques used for surface correction must not physically scrape the surface, chemically affect the surface or leave a residual product. Care is also required that all processes must be reversible (in future if it is realized that this are damaging).