selecting the Right Grit of Sandpaper

selecting the Right Grit of Sandpaper

Using the right sandpaper is the key to a victorious project. The right sandpaper can make a job faster and easier. Soft plastic and metal are vulnerable to permanent damage if the wrong sandpaper is used.

Sandpaper is made by binding an grinder material to a paper or cloth backing. Sandpaper comes in sheets, rolls, bands and disks. Sandpaper intended for use with power tools commonly has a heavier backing than hand-use sandpaper.

Sandpaper

A Strong Foundation

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The material used to hold grinder grit is called the backing. Several types of backing are available, each with its own qualities.

Paper is the most base backing material for sandpaper. Sandpaper with a stiff paper backing is good for large, flat areas or for use with power tools. Sandpaper with a more flexible paper backing is best for curved or textured surfaces.

Waterproof backing is used for wet/dry applications. A waterproof adhesive keeps the grinder material attached to the backing when wet sanding or using a lubricant.

Cloth backing is used to originate extremely flexible sandpaper. Cloth backed sandpaper is best for use with extremely contoured or detailed surfaces.

True Grit

The level of sandpaper's abrasiveness is referred to as its "grit". The grade of grit is commonly printed on the backing of sandpaper using the following scale:

40-60 Coarse

80-100 Medium Coarse

120-150 Medium

180-200 Fine

240 Very Fine

Sandpapers graded above 600 grit are useful for discontinue sanding on soft surfaces.

But What's It Made Of?

The grinder material used to make sandpaper is made of finely crushed minerals. Dissimilar minerals are used to sand Dissimilar materials.

Glass grit sandpaper uses quartz crystals for its abrasive. Glass grit sandpaper is soft and works well with painted surfaces.

Garnet grit is reddish in color and is the most base sandpaper abrasive. Garnet grit sandpaper works well on a wide range of materials.

Aluminum oxide grit sandpaper last longer than glass or garnet sandpapers. It is typically used for sanding metal surfaces and with power sanders.

Silicon carbide grit sandpaper can be used for wet and dry sanding. Silicon carbide sand paper can be used with hardwood, plastic and metal surfaces. This sandpaper is also great for smoothing glass edges.

selecting the Right Grit of Sandpaper

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