水研ぎ  パート3 サンディングペーストのレシピ　 “Sanding with a Lubricant, 潤滑材を用いてのサンディング　

Here is recipe for making an inexpensive and effective sanding paste from mineral oil and beeswax. Mineral oil is a liquid by-product of refining crude oil to make gasoline and other petroleum products. It is a common ingredient in baby lotions, cold creams, ointments, and cosmetics. It is colorless, odorless, and tasteless. In the U.S., mineral oil is readily available at your pharmacy since it is sold as a laxative. Baby oil is just mineral oil with some perfume added, and it can be used, too. Beeswax is available in bar or pellet form from your local beekeeper, craft stores, or online.

ミネラルオイルと蜜蝋を使ってサンディングペーストを作るレシピは、以下の通り。ミネラルオイルは、原油の精製の過程でできるもので、ベビーローションや化粧品などに使われている。薬局で買えるベビーオイルはお手軽だ。蜜蝋も固形もペレットもお店やネットで手に入れることができる。

I use a 1:4 ratio of beeswax to mineral oil by weight. To make 10 oz (283 g) of sanding paste, melt 2 oz (57 g) of beeswax in an old crock-pot. Wax melts faster with a larger surface area, so it is best to grate or shave the beeswax or chop it into smaller pieces if it is in block form. If you don’t have a crock-pot to spare, an alternative is a double boiler, easily made by placing a smaller pot on top of a larger one so it is heated by steam. Or place a smaller pot or can inside a larger pot, resting it on something to create a layer of water between the larger pot and the container holding the wax. Beeswax has a relatively low melting point—about 146° F (63°C)—so keep the heat on low and stir occasionally.

蜜蝋とミネラルオイルの割合は、重さで1:4。蜜蝋は小さくした方が溶けやすい。蜜蝋は直接火にかけないで、湯煎をすると良い。