水研ぎ  パート2 作業に使うツール　 “Sanding with a Lubricant, 潤滑剤を用いてのサンディング　

I use the term abrasive and not sandpaper because typically the backing of sanding products we use for our turnings is not actually paper. Paper backing on common sandpaper just does not hold up for very long when wet. The backing used for many of the abrasives favored by woodturners is typically cloth. Alternatively, the backing for sanding disks may be Mylar®, which provides a very flat and long-lasting support for the abrasive. Then there are open-mesh products like Mirka Abranet and Wonder Weave. These open-mesh abrasives contain aluminum oxide grain resin-bonded to a durable and long-lasting fabric. The open mesh contains thousands of small holes, which allow you to easily wash out the slurry from wet-sanding. Open-mesh abrasives perform great when sanding wet, or green, wood. They simply will not clog like other abrasives.

ここで使うサンディングの製品は、紙で裏打ちされていないので、研磨材と呼びたい。その研磨材の多くは、Mylar®のように布製で、Mirka Abranet とWonder Weaveはアルミ製のメッシュとなっている。このメッシュの研磨材は、簡単に粘土状のダストを洗い落とすことがてきる。

The most common sanding lubricant is water. Water can be especially useful when sanding green wood that already contains water and thus is not likely to readily absorb an oil. I especially like using water when sanding very thin, once-turned bowls from green wood. Using water as your lubricant allows you to use any final finish you want after the wood is dry.

Some turners prefer to use a solvent like citrus degreaser or mineral spirits. Mineral spirits will not interfere with any finish after it dries but is more toxic than other choices. One of my favorite lubricants for wet sanding dry wood is a sanding paste you can easily mix yourself from mineral oil and beeswax. (Mineral oil is known as paraffin oil overseas.) It traps the dust well without the use of a solvent. It is compatible with almost any drying oil finish such as tung oil, Danish oil, or Antique Oil.

Sanding mahogany with antique oil

最も一般的な潤滑剤は、水だ。グリーンウッドターニングの際には、水分はすでに木材に多く含まれているので特に便利だ。

柑橘系の洗浄剤?(citrus degreaser)やミネラルオイルを使うウッドターナーもいる。乾燥した木材の場合、私が最も愛用する潤滑剤は、ミネラルオイルに蜜蝋を溶かし込んだワックスだ。これなら簡単に自分で作れる。ミネラルオイルは海外ではパラフィンとも呼ばれている。

Other turners like to use their final oil finish as a sanding lubricant. The friction heat generated using the final finish as the lubricant helps cure the oil slurry mix that is forced down into the pores of the wood.

I primarily use Antique Oil as a finish and it works well over an oil or oil/wax lubricant. If you use non-oil finishes like lacquer or wipe-on polyurethane, you may want to do a test to ensure they are compatible or wipe off the piece with a solvent like mineral spirits before applying the finish. Another option is to apply a coat of shellac, which sticks to just about anything and is compatible with any finish.

また、オイルフィニッシュ使うオイルを潤滑剤として使っているターナーもいる。私は、Antique Oilを使っている。オイル系が嫌なら、ラッカーやウレタンを試してみれば良い。シェラックも使えるかもしれない。