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Old 25th December 2010, 06:56 PM   #11
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Yes, it's the hydrated cupric ion that's blue. If you want to see a really intense blue, dissolve a cupric salt in water and add a drop or 2 of clear household ammonia (ammonium hydroxide). The color comes from the complex cupric/ammonia ion that forms.
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Old 26th December 2010, 11:56 AM   #12
Arnulf is offline Arnulf  Europe
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Quote:
Originally Posted by HollowState View Post
Always a knit-picker in the crowd.
Yes, that's me

Quote:
Maybe later this evening I'll give myself a couple of lashes for not being exactly precise and perfect.
OK, that will do
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Old 26th December 2010, 04:50 PM   #13
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Does anyone know how to clean Edison Price unplated copper posts? I used to use a refrigerant with 3% HCl, and it did the job. I can't get it any more, and every cleaner I've tried since (vinegar, vinegar salt past, Lysol bowl cleaner, etc) cleans nicely, but in a few weeks corrosion returns with a vengeance. With my old cleaner, the posts would just darken with time. Now they get heavy deposits of blue salt. It's as if the post is breaking down chemically, maybe from using that Lysol stuff, which is 7% HCl. Any ideas?
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