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https://www.instructables.com/Old-PCB-to-Jewelry/
1. Introduction: Old PCB to Jewelry. Electronic waste is one of the biggest problems of modern world. We can take advantage of electronic waste to give a second life by creating pieces of jewelry, accessories that are useful for daily life. This project is about recycling scrap old PCB's into usable jewelry.Estimated Reading Time: 2 mins
https://www.pcbgogo.com/Blog/Why_Use_Gold_Rather_Than_Silver_And_Copper_in_PCB_Fabrication_.html
Oct 16, 2019 · Gold is perfect to use in applications that contain requirements for low voltage and low resistance, making it ideal for PCB contacts and other electronic applications. Nowadays, usage of gold in manufacturing for electronic devices has now far exceeded the consumption of the precious metal in jewelry fabrication.
https://www.epa.gov/sites/production/files/2013-09/documents/pcbinspectmanual.pdf
PCBs, or those materials which EPA requires to be assumed to contain 500 ppm or greater PCBs in the absence of testing. Investment Casting Wax: wax used to either cast small models of precious metals (mostly jewelry) or larger parts of steel, titanium, or alloys (precision casting).
https://www.etsy.com/market/pcb_jewelry
Circuit Board Necklace Blue Pendant Recycled Jewelry PCB Tear Drop Jewellery Green Geek Nerd Motherboard Computer Chip Gift for Her Techie. ElectrickeryArt. From shop ElectrickeryArt. 5 out of 5 stars. (222) 222 reviews. $26.80. Only 2 available and it's in 2 people's carts. Favorite.
http://www.idph.state.il.us/envhealth/factsheets/polychlorinatedbiphenyls.htm
PCBs were used widely in electrical equipment like capacitors and transformers. They also were used in hydraulic fluids, heat transfer fluids, lubricants, and plasticizers. The primary company that made PCBs in the United States was Monsanto Inc., mainly using the name Aroclor. Commercial production of PCBs ended in 1977 because of health ...
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