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Thread: Stopping Patina and Dullness in Copper

  1. #1
    Join Date
    Oct 2014
    Location
    Glasgow, Scotland
    Posts
    12

    Default Stopping Patina and Dullness in Copper

    I've made a copper piece (soldered and scratch effect on top) which at first looked amazing, but the patina set in soon after.
    I have cleaned this using a lemon / salt solution and a course brush then applied Rennaissance Wax (sadly not worked with copper before so only just discovered this).

    It still looked slightly dull but lighter but 3 days later, it is turning green round the edges and copper discolouration are now appearing.

    Id hate to scrap this piece but I am unsure if I have done something wrong or not coated straight away.

    Any advice please x

  2. #2
    Join Date
    Dec 2009
    Location
    Central London
    Posts
    8,379

    Default

    Yes copper is quick to tarnish and wax is useless to prevent it. Acrylic spray lacquer, such as Plasticote fares better: https://www.amazon.co.uk/Plasti-kote.../dp/B006XBT39Y

    Some members swear by Everbrite Protectaclear, But I have not used it: http://everbritecoatings.co.uk/small...ting-151-p.asp

    Much more disappointing is trying to preserve the patinas you get by applying heat to copper with a torch, because they disappear with wax and lacquer. Dennis
    Attached Thumbnails Attached Thumbnails cl Copper Leaf Brooch 2.jpg  
    Last edited by Dennis; 25-08-2016 at 02:46 AM.

  3. #3
    Join Date
    Oct 2014
    Location
    Glasgow, Scotland
    Posts
    12

    Default

    Thanks so much Dennis, I'm learning new metals from books but never encountered this issue before and gave me a wee scare!

    Thanks for the suggestions, I'll give these a go x

  4. #4
    Join Date
    Feb 2011
    Location
    Scotland
    Posts
    3,103

    Default

    I've not known copper go green so quickly. I've been working on natural patina effects and cleaning with lemon juice will have caused the green so quickly I think. Although lemon and salt is a good cleaner for large areas of copper ware, I've found it leaves it quite dull and it then needs finished off with a copper cleaner or a wire brush if you already have a scratch finish. I've found that copper textured through a rolling mill doesn't tarnish at all and has stayed bright after months, I have then tried to oxidise it with little effect

  5. #5
    Join Date
    Oct 2015
    Posts
    60

    Default

    I use the Protectaclear and would recommend it

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