I‘ve read that in Japanese lacquer art (maki-e), gold powders that were fine to begin with can be ground even finer by hand. How would they successfully do this, and can this process be used on other metals? (like brass, bronze, copper, aluminum, etc)
I would think it depends on the hardness of the metal. Gold is very soft so it would be easy to grind up. Something like bronze or copper would be more difficult. I would think to create metal powder it would be easiest to simply grind a bar of it down using the rough edge of something harder.
That code usually means a GAS CAP is loose!! For a SIMPLE FIX, turn the gas cap a few clicks tighter, or get a new gas cap. DO THIS BEFORE ANY EXPENSIVE REPAIRS and if that fixes it, you've saved a wad of cash.
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i own a repair shop,and this is the sensor that mounts on the evaporator canister for it,its under warranty ,so id take it back and have the dealer repair it for free,why spend money when you don't have to,but that's what it means,and a lose gas cap will also set this off also on it,good luck i hope this help,s,and have a happy thanks giving.
Actually, gold is very malleable, so it would be relatively hard to grind. Harder, brittle metals would be easier to smash into powder. I would suspect that with gold, the metal is first hammered into very thin sheets (gold leaf), and these are then crumpled to produce small flakes. Such thin sheets would be fairly easy to powder. Grinding a metal bar is a messy process, which is fine for something like aluminum, but with gold, you want to make sure you don't waste any of the metal. With other metals, the same technique might be successful. Aluminum and copper are fairly malleable. However, other techniques would be able to prepare fine powders more easily and cheaply. Powdered metals are required in large quantities by the paint, pyrotechnics, and rocketry industries I have seen electrolytically prepared copper powder, and other metal powders can be prepared chemically by precipitation or by reduction of a powdered compound of that metal (this is the usual production route for platinum group metals). Something like aluminum is difficult to reduce; most aluminum powder is prepared by spraying the molten metal to produce a fine powder or by grinding down solid bars. This powder may be further refined, for example by ball milling to produce small flakes. These industrial processes would be difficult to complete on your own, but their use means that these metal powders are widely available for purchase. Expect to pay anywhere from $10 to $30 for a pound of pyrotechnics-grade aluminum powder.
