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Arboform consists of the two most abundant natural materials: lignin (ca. 30%) and cellulose (ca. 60%). The remaining part is natural additives that function as plasticizers, dyes, antioxidants, fillers, etc. [4] It has a similar composition, appearance and properties to those of wood, but it can be melted upon heating and molded like a thermoplastic. [5]
The bunks ride on a rail system at the bottom of the cylinder. Once filled, the container is subjected to a hard vacuum, drawing all the air and any remaining moisture out of the wood. Then, the cylinder is filled nearly full of the ACQ solution and a pressure of 150PSI is applied for several hours to force the solution completely into the wood.
Pore fillers used for large flat surfaces such as floors or table tops generally contain silica instead of or in addition to wood dust. Pores can also be filled using multiple coats of the final finish rather than a pore filler. [1] [2] The main problem in using putty is matching the colour of the putty to that of the wood.
Wood finishing starts with sanding either by hand, typically using a sanding block or power sander, scraping, or planing. Imperfections or nail holes on the surface may be filled using wood putty or pores may be filled using wood filler. Often, the wood's color is changed by staining, bleaching, or any of a number of other techniques.
After cure, the PF prevents wood from springing back. This has been used to make high density, very hard wood products, known as “compreg” or “Staybwood”. [11] The increase in both strength and stability of the wood is due to the cross-linking of the resin components and the resin's ability to bulk the cell wall.
A grain filler (pore filler or paste wood filler) is a woodworking product that is used to achieve a smooth-textured wood finish by filling pores in the wood grain. It is used particularly on open grained woods such as oak , mahogany and walnut where building up multiple layers of standard wood finish is ineffective or impractical.