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ID: dAWvU+hH/biz/60718088#60719201
8/1/2025, 12:05:51 AM
>>60718851
Keeping copper pink is tricky. It oxidizes super fast and easily. Even in a sterile environment, a fingerprint will provide enough corrosive material to change the surface color.
A solution I've found works is to use archive-grade plastic sleeves for paper sheets, and seal the bars (with as little space for air inside as you can) with a heat sealer (like for sandwiches or meats). Pic related. The archival plastic leeches no gas to stain the Cu. The trick is in getting the seals air-tight. If you can't, then you can use clear tape to cover the seams you make.I've had bars stored like this for a decade and they're still perfectly pink.
I've also used the food plastic designed for the heat sealer on my big bar (10kg), and that seems to be working as well. It hasn't been sealed as long as the rest, but it's been impressively long (a year?).
Keeping copper pink is tricky. It oxidizes super fast and easily. Even in a sterile environment, a fingerprint will provide enough corrosive material to change the surface color.
A solution I've found works is to use archive-grade plastic sleeves for paper sheets, and seal the bars (with as little space for air inside as you can) with a heat sealer (like for sandwiches or meats). Pic related. The archival plastic leeches no gas to stain the Cu. The trick is in getting the seals air-tight. If you can't, then you can use clear tape to cover the seams you make.I've had bars stored like this for a decade and they're still perfectly pink.
I've also used the food plastic designed for the heat sealer on my big bar (10kg), and that seems to be working as well. It hasn't been sealed as long as the rest, but it's been impressively long (a year?).
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