how copper made crushing

3 Ways to Oxidize Copper - wikiHow Jan 25, 2017· Bury copper in white vinegar. White vinegar can produce a green or blue patina on copper, but requires another material to hold the moisture close to the metal. Let the copper soak in a mixture of white vinegar and salt, or bury it in sawdust or even crushed potato chips, then soak the . Why are copper washers required on banjo fittings? - Motor ... I'm assuming that copper is a softer metal than bronze, brass or steel so they will squish when torqued to make a seal. However, I've seen copper crush washers that had an embossed ring in the center of the washer that would actually crush down when under pressure. How to Bend Copper Pipe and Tubing without Crushing It - 1 Intro: How to Bend Copper Pipe and Tubing without Crushing It. I recently made a copper tubing coil to use in a solar-powered water-boiler and learned the right way and the wrong way to bend copper . Amazon: Copper Crush Washer - Copper Uxcell a16072700ux0585 20mm x 16mm x 2mm Flat Ring Copper Crush Washer Sealing Gasket Fastener Copper (Pack of 10) by uxcell. $6.17 $ 6 17 Prime. FREE Shipping on eligible orders. 5 out of 5 stars 3. Product Features Package Content : 10 x Copper Washer.    Read More