sanding before painting wood

Sanding before painting wood is an important step in the wood finishing process. Sanding aims to prepare wood media so that the finishing application process is easy to do. Wood that is not sanded or sanding imperfectly will complicate the finishing process. Even the finishing process may fail due to failure in the sanding process.

Any several types of sandpaper that exist according to the material of manufacture:

Garnet, made from natural ingredients. Often used on wood. This sandpaper is easy to use but smoother faster than other sandpaper.

Silicone carbide, this sandpaper is good for use in iron, titanium, brass, copper, rubber, plastics, wood panels, glass, stone. The amplification is neat because it can lift all rough surfaces attached to the wood media.

Aluminum oxide, this sandpaper is used specifically in wood, stainless steel, aluminum, metal, hardwood, leather. The surface is smoother when compared to silicon carbide, but it is more durable in use.

Ceramic, this sandpaper material is expensive because it can sand strongly, and this sandpaper is durable. Suitable for sanding wrought steel or nickel and cobalt-based steels.

Alumina zirconia, this type of sandpaper is hard and can last a long time in use. If you want to sand with tools, you can choose to use this sandpaper.

Common Grit Used In Sanding Wood

Coarse and fine sandpaper is indicated by the numbers printed on the back of the rough surface of the cloth/sandpaper. The bigger the number indicates the finer and denser the arrangement of the sand. For example, for cloth sandpaper numbers, namely number 0, number 1, number 2, number 3, and so on. The numbers on the paper sandpaper and roll sandpaper are the numbers 24, 30, 36, 40, 50, 60, 80,100,120,150,180, 220, 240, 280, 320, 360, 400, 500, 1000 and so on.

For grinding (leveling and shaping) usually use a coarse grit (24-80). for blending (disguise and smooth) usually use medium grit sandpaper (100-180). For finishing using fine grit (240 - 400), for smoothing using superfine (400-600). And for superfinishing using micro-fine (800-1200).

Wood Sanding Method

the sanding should be parallel to the wood grain. Unless there are special needs, for example sanding after the wood filler or wood putty process. When sanding, try to equalize the hand pressure on the wood.

When sanding manually, you should use a piece of wood covered with a softer material (soft board) as a sandpaper 'klos'.

This 'klos' will help make the sanding groove more smooth and flatter. This method will also prevent your hands from getting injured due to scratches during sanding. For a wide work area, you should use a hand sander machine so that the results are maximum.

stages of sanding wood.

After the machining process (planer, wood shavings, etc.), the first grit sandpaper that can be used is 80/100. This sanding process serves to cut large fibers, machine markings, and other rough edges.

After that continue with grit 120, 220/240. At this level, the rough lines of the fibers are no longer visible. If you need to continue with 320 grit that's fine. This sanding is to prepare the wood to be ready before the next finishing process.

The type of sandpaper used and what numbers should be used, also depends on the type of wood. There are several types of hardwood that require sanding up to 320 grit before the next finishing process.