Woodturning - understanding Sandpaper
Woodturners use sandpaper to bring the outside of a turned piece into shaper for final finishing. In some cases a very fine sandpaper may be used to faultless the end itself, particularly if a lacquer end has been applied. It helps to understand what sandpaper is in order to use it well.
Sandpaper has been used for outside establishment at least since the thirteenth century when the Chinese recorded that varied materials had been glued to parchment using natural adhesives so as to refine the surfaces of prepared objects. Some citizen had already used the natural polisher qualities of clear plants as well rough shark skin in the same fashion. Today it belongs to a house of coated abrasives which consist of varied materials such as aluminum oxide bonded to materials like paper or cloth.
Sandpaper
Sand and glass were the earliest materials to be used for this purpose, thus leaving glasspaper and sandpaper as generic names for the abrasives even though glass or sand are seldom used today except on the cheapest of products. Woodturners and other woodworkers should avoid them at all costs. Buying them is false economy.
Most woodturners will use sandpaper with a paper backing although mylar is often used for very high grits. take a paper that allows for in effect contouring to the curves of a turned object. The finer grits above three or four hundred will ordinarily have a very flexible mylar backing and waterproof resins that allow for wet or dry sanding although woodturners will ordinarily be sanding dry.
While there are a variety of materials used for sanding, woodturners and for that matter woodworkers of all types ordinarily use only three. Garnet is a favourite of woodworkers and is often used in grits up to three hundred. Aluminum oxide tends to be more costly but last longer under high heat conditions which may sometimes be found in finishing woodturnings and is often found up to four hundred grit. Silicon carbide is also long persisting but again more costly and woodturners ordinarily use it for grits six hundred and above. Most of the time it is found in wet or dry paper and is often purchased from auto supply shop where it is sold for sanding end coats of lacquer.
Grits leave a best outside the higher the amount but it makes no sense to start with too high a grit as it takes a long time to sand out any irregularities and scratches in the starting surface. Coarse grits have a lower amount and remove material faster but leave scratches that must be removed with the next higher grit leaving smaller scratches and so on.
Regardless of the material found in the sandpaper, a proper sanding job will leave a outside that a good end will make shine. However, that end is only as good as the outside it goes on. Taking time to understand and use sandpaper well will give a woodturner a scheme to be proud of.
Woodturning - understanding Sandpaper
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